Math, asked by 00002093, 11 months ago

sin4a-cos 4a =2sina-1+sin?

Answers

Answered by sandy1816

4

Step-by-step explanation:

(sin⁴a)-(cos⁴a)

=(sin²a)²-(cos²a)²

=(sin²a-cos²a)(sin²a+cos²a)

=(sin²a-1+sin²a)1

=2sin²a-1

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