Math, asked by manaarrehman189, 8 months ago

prove (sin²x)² - (cos²x)² = 1 - 2cos²x

Answers

Answered by pk515494

0

Step-by-step explanation:

(sin²x)²-(cos²x)²

(sin²x+cos²x)(sin²x-cos²)

(1)(sin²x-cos²x)

Because sin²x=1-cos²x

so,

(1-cos²x-cos²x)

=(1-2cos²x)

Answered by BrainlyIAS

1

Step-by-step explanation:

plz mark my ans as brainliest

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