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Find all values of theta in the interva ...

Find all values of theta in the interva `(-pi/2,pi/2)` satisfying the equation `(1-tantheta)(1+tantheta)sec^2theta+2tn^2theta=0`

A

`pi//4`

B

`-pi//4`

C

`pi//3`

D

`-pi//3`

Text Solution

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The correct Answer is:
C, D
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