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3 years ago

15

Prove the following identi v 1-cos2A/sin2A=tanA

1 answer:

SVETLANKA909090 [29]3 years ago

8 0

Answer:

1-cos2A/sin2A

=(1-cos^2 A+sin^2 A)/(2sinAcosA)

=(sin^2 A+sin^2A)/2sinAcosA

=2sin^2 A/2sinAcos^2 A

=sinA/cosA

=tanA

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