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K

K. 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Continuity and Differentiability

Find all the points of discontinuity of f, where f(x) = sin x / x; x + 1 if x = 0 and x < 0?

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Answer

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S

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Daljit Kaur replied | 20/11/2016

-cos x + sin x

0 0

Hussam Uddin replied | 29/11/2016

(-cosx) + (sinx).

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Answer

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R

Robin 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

What is the value of sin 50 - sin 70 + sin 10?

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Sonu Pal replied | 18/11/2016

0

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Richa replied | 19/11/2016

0

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Answer

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S

Shubham 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

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Puneet replied | 22/11/2016

sin45 + (1/sin45)=((sin45)^2 +1)/sin45 =3/(2 *square root 2)

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Sarvajeet replied | 02/12/2016

3/square root 2

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S

Shail 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Integrals

Which is more easier derivative or integration?

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G

Gagan replied | 01/12/2016

Integration is quite easier than derivation.

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Answer

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N

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Sanjeev replied | 07/12/2016

Put x = 45 degree.

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Sanjeev replied | 07/12/2016

Put x = 45 degree value =a.

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D

Deepthi 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

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S

Shiv replied | 19/11/2016

1

0 0

Sarvajeet replied | 02/12/2016

1

0 0

Answer

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A

Arati Chaudhari 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of [cos(2x) + sin (2x)] with respect to x?

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Prateek replied | 19/11/2016

-2 sin 2x + 2cos2x

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Muraleedharan replied | 20/11/2016

-2 Sin 2x + 2 Cos 2x = 2 [ Cos 2x - Sin 2x ]

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R

Rahul 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of cos[(square of (x) + 1)] with respect to x?

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Sarvajeet replied | 26/11/2016

-2x[sin{(square of (x) + 1)}].

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Answer

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S

Swati 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of [x cos(x)] with respect to x?

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Sarvajeet replied | 26/11/2016

cos(x) - xsin(x).

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Answer

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N

Nasreen 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of [square of (x) - 9] / (x - 3) with respect to x?

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Sarvajeet replied | 26/11/2016

1

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Answer

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R

Rituraj 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (cube of sinx)(cube of cosx) with respect to x?

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Sarvajeet replied | 26/11/2016

3(square of tanx) (square of secx).

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Answer

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A

Ashish 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (ax + cot x) with respect to x?

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Shreyans replied | 08/12/2016

a - (Cosec)^2 X.

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Answer

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J

Jitendra 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (2 sin 90 + 2 cos 90) with respect to angle?

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Nirmal Bhasu replied | 06/12/2016

Zero.

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Answer

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A

Ambar 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (1 + tan 45) with respect to angle?

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Jeet replied | 08/12/2016

it's a constant. So, the answer is zero.

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Answer

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R

Raveena 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (tan 2x - x) with respect to x?

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Jeet replied | 08/12/2016

2 (square of Sec2x) - 1.

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Answer

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A

Ankan 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Derivatives

Write the derivative of (x - 4)/(4 + x) with respect to x?

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Sarvajeet replied | 02/12/2016

8/square of (x+4).

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Answer

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V

Vikna 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

If tan x = b / a, then find the value of (a + b) / (a - b)?

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Jeet replied | 02/12/2016

sec2x + tan2x.

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Answer

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V

Vivek 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

If a cos x + b sin x = m and a sin x - b cos x = n, show that (square of a) + (square of b) = (square of m) + (square of n)?

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Gunturi replied | 03/12/2016

Square the two equations and add. Apply the Pythagorean trigonometric Identity.

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Answer

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J

Jagadeesh 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

Find the value of (tan 22 degree)?

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Rachna replied | 18/11/2016

Around 0.4

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Richa replied | 19/11/2016

0.008851

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Answer

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G

Gaurang 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

If tan x = 1/2 and tan y = 1/3, then what is the value of x + y?

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Tapas replied | 28/11/2016

tan(x + y) = [tan x + tan y] / [1 - (tan x)(tan y)] = [(1/2) + (1/3)] / [1 - (1/2)(1/3)] = 1 = tan (pi/4)
So, x + y = pi/4 radian = 45 degrees.

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Sarvajeet replied | 02/12/2016

45 degree.

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Answer

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S

Shamss 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

If tan x = m / m + 1, tan y = 1/2m +1 then what is the value of x + y?

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Sreedevi replied | 07/12/2016

45 degrees.

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Answer

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K

Kiran 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

What is the value of sin(45 + x) - cos(45 - x)?

0 0

Sarvajeet replied | 02/12/2016

0

0 0

Answer

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S

Sujish 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

What is the minimum value of 3 cosx + 4 sinx + 8?

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Ankit replied | 22/11/2016

f(x) = 3cosx + 4sinx + 5
f '(x) = -3sinx + 4cosx
0 = -3sinx + 4cosx
3sinx = 4cosx
tanx = 4/3
x = 0.927 + npi radians for all integers, n
f ''(x) = -3cosx - 4sinx
f ''(0.927) = -5 < 0 so a maximum occurs at x = 0.927
f ''(0.927 + pi) = 5 > 0 so a minimum occurs at x = 4.069
f(0.927 + pi) = f(4.069) = 0

0 0

Sarvajeet replied | 02/12/2016

9

0 0

Answer

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P

Parna 10/11/2016 in  Class XI-XII Tuition (PUC), Mathematics(Class XI-XII Tuition (PUC)), Trigonometry

If sin x + cos x = 1, then what is the value of sin 2x?

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Hussam Uddin replied | 22/11/2016

Squaring on both sides, we get sin2x+ cos2x + sin2x = 1, 1 + sin 2x = 1, sin2x = 0.

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Sarvajeet replied | 03/12/2016

0

0 0

Answer

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