Math, asked by doluisoumili, 9 months ago

e Sina
1+ COSA
I-cosa,
sina

Answers

Answered by rahulgyn12

0

Answer:

1+cosA

sinA

+

1−cosA

sinA

=sinA[

(1+cosA)(1−cosA)

1−cosA+1+cosA

]

=sinA(

sin

2

A

2

)=

sinA

2

=2cosecA

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