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Solve for theta: cos^2 theta-sin^2 theta...

Solve for `theta`: `cos^2 theta-sin^2 theta=1/2,0 यदि `cos^2 theta-sin^2 theta=1/2,0

A

`60^@`

B

`45^@`

C

`40^@`

D

`30^@`

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PINNACLE-TRIGONOMETRY-EXERCISE
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