Math, asked by jairamnayak77, 10 months ago

1 - 2 cos²A=tan²A-1/tan²A+1

Answers

Answered by sandy1816

1

Step-by-step explanation:

tan²A-1/tan²A+1

=sin²A-cos²A/sin²A+cos²A

=sin²A-cos²A

=1-cos²A-cos²A

=1-2cos²A

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