Question

Question 25 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 + cos x)(x - tan x)

Class XI - Limits and Derivatives Page 318

Answer 1

refer to the attachment.

formulas​ used
d/dx(cosx) = -sinx
d/dx(tanx) = sec²x

sec²x-1= tan²x


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Answer 2

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