#### Answer

$2\cos ^{2}\dfrac {x}{2}\tan x=\tan x+\sin x$

#### Work Step by Step

$2\cos ^{2}\dfrac {x}{2}\tan x=2\times \dfrac {\left( 1+\cos x\right) }{2}\tan x=\left( 1+\cos x\right) \tan x=\tan x+\sin x$

Published by
Pearson

ISBN 10:
013421742X

ISBN 13:
978-0-13421-742-0

$2\cos ^{2}\dfrac {x}{2}\tan x=\tan x+\sin x$

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