Math, asked by dmdesai243, 9 months ago

cos² theta - sin² theta = 2cos² theta - 1

Answers

Answered by selectivelyavailable

1

Step-by-step explanation:

we know

sin²x + cos²x = 1

thus, sin²x = 1- cos²x

cos²x -(1-cos²x)

= cos²x - 1+ cos²x

= 2cos²x -1

Answered by varun306835

0

Answer:

ok this is answer

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