Q. 65.0( 1 Vote )

Choose the correc A. 2sin² x – 1

B. 2cos² x – 1

C. 1 + 2 sin²x

D. 1 – 2 cos²x

Answer :

we can write –

∴

Now applying formula,

⇒

We know that,

⇒

⇒ (∵

⇒

Hence,

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Choose the correc A. 2sin2 x – 1B. 2cos2 x – 1C. 1 + 2 sin2xD. 1 – 2 cos2x