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cos A + sin(270^(@) +A)-sin(270^(@)-A)+ ...

`cos A + sin(270^(@) +A)-sin(270^(@)-A)+ cos(180^(@)-A)=`

A

`sin theta `

B

`0`

C

`cos theta `

D

`1`

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The correct Answer is:
B
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DIPTI PUBLICATION ( AP EAMET)-TRIGONOMETRIC RATIOS AND IDENTITIES -EXERCISE 1 A ( TRIGONOMETRIC FUNCTIONS)
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  9. If A,B,C,D are the angles of a cyclic quadrilateral then sinA+sinB=

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