1.

1) cos 2x=cos2 x−sin2 x 2) 1+sin 2x=(cosx+sinx)2 3) 1−sin 2x=(cos x−sin x)2 How many of the above statements are correct?

Answer»

1) cos 2x=cos2 xsin2 x

2) 1+sin 2x=(cosx+sinx)2

3) 1sin 2x=(cos xsin x)2

How many of the above statements are correct?



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