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Tamil Nadu Board of Secondary EducationHSC Science Class 11

Find the derivatives of the following:tan (x + y) + tan (x – y) = x

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Question

Find the derivatives of the following:
tan (x + y) + tan (x – y) = x

Sum
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Solution

tan (x + y) + tan (x – y) = x

Differentiating with respect to x

`sec^2 (x + y) (1 + ("d"y)/("d"x)) + sec^2 (x - y) (1 - ("d"y)/("d"x))` = 1

`sec^2 (x + y) + sec^2 (x + y) ("d"y)/("d"x) + sec^2 (x - y) - sec^2 (x - y) ("d"y)/("d"x)` = 1

`[sec^2 (x + y) - sec^2 (x - y)] ("d"y)/("d"x) = 1  sec^2 (x + y) - sec^2 (x - y)`

`("d"y)/("d"x) = (1 - sec^2 (x + y) - sec^2 (x - y))/(se^2 (x + y) - sec^2 (x - y)`

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Chapter 10: Differential Calculus - Differentiability and Methods of Differentiation - Exercise 10.4 [Page 176]

APPEARS IN

Samacheer Kalvi Mathematics - Volume 1 and 2 [English] Class 11 TN Board
Chapter 10 Differential Calculus - Differentiability and Methods of Differentiation
Exercise 10.4 | Q 8 | Page 176

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