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1)

If y = tan14x1+5x2+tan12+3x32x then dydx


A) 11+25x2+21+x2

B) 51+25x2+21+x2

C) 51+25x2

D) 11+25x2

Answer:

Option C

Explanation:

y = tan14x1+5x2+tan12+3x32x

= tan15xx1+5x.x+tan123+x123.x

=tan15xtan1x+tan123+tan1x

then dydx51+25x2