Q.

If ddxxtanx=xtanxf(x)x+g(x)logx then 2f(x)g(x)=

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

cos2x

b

sinx

c

sin2x

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Let y = xtanx
logy=tanx.logx
Diff. w.r.t to x
1ydydx=tanx×1x+logxsec2xdydx=xtanxtanxx+sec2xlogxf(x)=tanxg(x)=sec2x2f(x)g(x)=2tanxsec2x=2sinxcosx×cos2x=sin2x

Watch 3-min video & get full concept clarity
score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
If ddxxtan⁡x=xtan⁡xf(x)x+g(x)log⁡x then 2f(x)g(x)=