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Prove the following identities: (sinal...

Prove the following identities:
`(sinalpha+cosecalpha)^2+(cosalpha+secalpha)^2=tan^2alpha+cot^2alpha+7`

A

`9`

B

`7`

C

`5`

D

`3`

Text Solution

Verified by Experts

The correct Answer is:
B
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