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Find the derivative of the following functions from first principle:
(i) –x (ii) (–x)–1 (iii) sin (x + 1)
(iv)
(i) Let f(x) = –x. Accordingly,![]()
By first principle,

(ii) Let
. Accordingly,![]()
By first principle,


(iii) Let f(x) = sin (x + 1). Accordingly,![]()
By first principle,

(iv) Let
. Accordingly,![]()
By first principle,


Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (x + a)
Let f(x) = x + a. Accordingly,![]()
By first principle,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
![]()
By Leibnitz product rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (ax + b) (cx + d)2
Let![]()
By Leibnitz product rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):

By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (ax + b)n
![]()
By first principle,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (ax + b)n (cx + d)m
Let![]()
By Leibnitz product rule,



Therefore, from (1), (2), and (3), we obtain

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): sin (x + a)
Let![]()
![]()
By first principle,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): cosec x cot x
Let![]()
By Leibnitz product rule,
![]()
![]()
By first principle,

Now, let f2(x) = cosec x. Accordingly,![]()
By first principle,


From (1), (2), and (3), we obtain

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()

By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): sinn x
Let y = sinn x.
Accordingly, for n = 1, y = sin x.
![]()
For n = 2, y = sin2 x.

For n = 3, y = sin3 x.

We assert that ![]()
Let our assertion be true for n = k.
i.e., ![]()

Thus, our assertion is true for n = k + 1.
Hence, by mathematical induction,![]()
Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

By first principle,

From (i) and (ii), we obtain

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): x4 (5 sin x – 3 cos x)
Let![]()
By product rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (x2 + 1) cos x
Let![]()
By product rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (ax2 + sin x) (p + q cosx)
Let![]()
By product rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By product rule,

Let
. Accordingly,![]()
By first principle,

Therefore, from (i) and (ii), we obtain

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let
By quotient rule,

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers):
Let![]()

By first principle,

From (i) and (ii), we obtain

Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): (x + sec x) (x – tan x)
Let![]()
By product rule,



From (i), (ii), and (iii), we obtain
![]()
Find the derivative of the following functions (it is to be understood that a, b, c, d, p, q, r and s are fixed non-zero constants and m and n are integers): ![]()
Let![]()
By quotient rule,

It can be easily shown that ![]()
Therefore,

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