Question

cos x - cos 2x /1 - cos x ka integration kaya hoga ???

Answer 1

this is your answer.

Answer 2

The answer is  = 2 sin x + x + C  

Explanation:

We need  

cos 2 x = 2 cos 2 x − 1  

Therefore,

∫ ( cos x − cos 2 x ) d x/ 1 − cos x

= ∫ (cos 2 x − cos x ) d x/ cos x − 1

= ∫ ( 2 cos 2 x − 1 − cos x ) d x/ cos x − 1

= ∫ ( 2 cos x + 1 ) ( cos x − 1 ) d x /cos x − 1

= ∫ ( 2 cos x + 1 ) d x  

= 2 sin x + x + C