Math, asked by dinesh1752, 1 year ago

cot A - cosec 2A= cot 2A

Answers

Answered by janvitha

7

Answer:

proved

Step-by-step explanation:

(cosA/sinA)-(1/sin2A)

=(cosA/sinA)-(1/2sinAcosA)

=(2sinA cos^2 A-sinA)/(2sin^2 A cosA)

=sinA(2cos^2 A-1) / (2sin^2 A cosA)

=cos2A/sin2A

=cot2A

Answered by punith123

4

Step-by-step explanation:

cosa/sina-1/sin2a

=cosa/sina-1/2sina

=2cos^2A-1/2sinacosa

=cos2A/sin2A

=cot2a

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