Math, asked by arpitaAru, 6 months ago

PLEASE SOLVE THIS FAST

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Answers

Answered by radha321yadav

0

Answer:

option b

Step-by-step explanation:

cos⁴x-sin⁴x=. cos⁴x-(1-cosx)²

cos⁴x-(1+cos⁴x-2cosx)

cos⁴x-1-cos⁴x+2cosx

2cosx-1

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