Math, asked by ipsitasingharoy213, 3 months ago

Find the value of (1 + cosA)(1 - cosA) cosec2A​

Answers

Answered by Anonymous
14

Answer:

→(1 + cosA)(1 - cosA) cosec2A

=>(1-cos^2A) cosec^2A.

=>sin^2A*cosec^2A.

=>1/cosec^2A*cosec^2A.

=>1.

Formula used.

  • a^2-b^2=(a-b)(a+b).
  • 1-cos^2a=sin^2a.
  • sin^2A=1/cosec^2A.
Answered by vishnureddu955047575
0

Answer:

1

Step-by-step explanation:

(1-cosA) (1+cosA) cosec^2A

=(1-cos^2A) cosec^2A

=sin^2A×cosec^2A

=sin^2A×1/sin^2A

=1

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