1.

Solve:? tan ? (Cos x) = tom? (ricose ex)

Answer»

2 tan^-1x=tan^-1*2x/1-x^2

2tan^-1(cos x) =tan^-1*2(cos x)/(1-cos^2x)

=tan^-1(2 cosx/sinx)

=tan^1(2*cosec x)

tan^-1(2 cos x/sin^2 x)=2 cosec x

cos x/sin^2x=cosec x=1/sin x

cos x=sin^x/sin x

cos x=sinx

1=sin x/cos x

tan x=1

tan x=tan π/4

therefore

x=π/4

right answer bhai........


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