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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Trignometry
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If $\tan x=\large\frac{b}{a}$ then the value of $a\cos 2x+b\sin 2x$ is


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$a\cos 2x+b\sin 2x=a\large\frac{1-\tan^2 x}{1+\tan^2 x}+\frac{b.2\tan x}{1+\tan^2 x}$
Hence (a) is the correct option.
answered Oct 9, 2013 by sreemathi.v

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