Math, asked by akshithakotte4567, 4 months ago

answer..................

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Answers

Answered by ayushagrawal1310

2

Answer:

1/8

Step-by-step explanation:

we know that,

cos2x = cos²x - sin²x

= 2cos²x - 1 ( replacing sin²x by 1-cos²x )

Given, cosx = 3/4

so 2 × 9/16 - 1 = 1/8 ans

HOPE IT HELPS!

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