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CBSE/Class 12/Science/Mathematics Tuition/Class XI-XII Tuition (PUC)

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Physics Teacher

find the attached solution
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Tutor

contemplate on basic
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Tutor

go to basic
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think
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Computer wizard and mathematics lover

you can contact me
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Tutor

(1+?2)/?2
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IIT JEE Coach

Hello Archit, Please see the solutions below: 2. Let (h,k) be the midpoint of the chord. Then the equation of the chord with midpoint (h,k) is: (hx/3)-(ky/7) = (h^2/3) - (k^2/7) (Equation given by T1 = S1). 7x + y = 20 is the equation of the same line. Comparing the coefficients of the line... read more
Hello Archit, Please see the solutions below: 2. Let (h,k) be the midpoint of the chord. Then the equation of the chord with midpoint (h,k) is: (hx/3)-(ky/7) = (h^2/3) - (k^2/7) (Equation given by T1 = S1). 7x + y = 20 is the equation of the same line. Comparing the coefficients of the line we get: h/(3*7) = -k/(7) = ((h^2/3) - (k^2/7))/20 So k/h = -1/3 Now the line whose equation we require to find passes through the origin and (h,k) So the equation of the line is y = (k/h).x Since k/h = -1/3, the equation of the line is y = (-1/3)x ---------------------------------------------------------------------------------------------------------------------------------------------- 3. The equation of the hyperbola can be written as (x^2/16) - (y^2/25) = 1 Let the point on the Hyperbola be (4secA, 5 tan A) The equations of the assymptotes are given by (x^2/16) - (y^2/25) = 0 Factorizing out the 2 stratight lines, we get the 2 equations as y = 5x/4 and y = -5x/4 Let Q be the point on y = 5x/4. Since the abscissa remains same, the x coordinate of Q is 4secA. So the y coordinate of Q is y = 5.4secA/4 = 5secA So Q: (4secA, 5secA). Now R lies on y = -5x/4. Solving similarly like we did for Q, the coordinates of R would be (4secA, -5secA). We also have P: (4secA,5tanA) So, PQ = 5(secA-tanA) and PR = 5(secA+tanA) Therefore, PQ.PR = 25.((secA)^2-(tanA)^2) For any angle A, ((secA)^2-(tanA)^2) = 1 Therefore, PQ.PR = 25. Let me know if you have any questions. Thanks read less
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JEE/Board Maths Tutor

i suggest u to learn the topic logically before proceeding with this bcoz it was simple if u had complete idea of the thing
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Tutor with 25+yrs of international exp, teaching Math, Science, Humanity & IT, EnTC Engineering

Dear Archit, you must have your basics right about the conics section, here particularly, Hyperbola. Suggestions: Try reading basics (Even though you know), then solve some ques based on it and then take on the particular questions. Devote time separately to such topics. I m sure your will over come... read more
Dear Archit, you must have your basics right about the conics section, here particularly, Hyperbola. Suggestions: Try reading basics (Even though you know), then solve some ques based on it and then take on the particular questions. Devote time separately to such topics. I m sure your will over come by following the said pattern. Come back if you need more help. read less
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Mathematics teacher

I can help you to solve these online
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