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cos^(2)(""(pi)/(6) + theta ) -sin^(2)""(...

`cos^(2)(""(pi)/(6) + theta ) -sin^(2)""((pi)/(6) - theta ) = `

A

`(1)/(2) cos 2 theta `

B

`0`

C

`-(1)/(2) cos 2 theta `

D

`-1`

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A
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 B ( COMPOUNDS ANGLES )
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