Math, asked by fortunerlover, 1 day ago

2×cos2a -1 simplified to

Answers

Answered by Anonymous

0

2cos2a-1

=2(1-2sin²a)-1

=2-4sin²a-1

=1-4sin²a

=(1)²-(2sina)²

=(1+2sina)(1-2sina)

•Advance study:

cos2a=cos²a-sin²a

=2cos²a-1

=1-2sin²a

Step-by-step explanation:

Answered by ja697563

0

Step-by-step explanation:

give me a thanks because I understand that my answer is right

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