CGL 22 : 08/12/2022 Shift 1

If sin Y = x, then what will be the value of cos 2Y (where 0 ≤ Y ≤ 90°)?

यदि sin Y = x है, तो cos 2Y (जहाँ 0 ≤ Y ≤ 90°) का मान क्या होगा?

A

1 – 2x

B

(√2-1)x

C

1 – 2x²

D

√2x

Correct Answer:

C

1 – 2x²

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