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cos 225^(@)+ sin 165^(@)=...

` cos 225^(@)+ sin 165^(@)=`

A

0

B

`(sqrt(3)-1)/(sqrt(3))`

C

`(sqrt(3)-1)/(2sqrt(2))`

D

`(sqrt(2)+1)/(sqrt(2))`

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The correct Answer is:
A
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 A ( TRIGONOMETRIC FUNCTIONS)
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