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If sin x+sin y=3(cos y-cos x) then the v...

If `sin x+sin y=3(cos y-cos x)` then the value of `sin 3 x+sin 3 y=`

A

1

B

-1

C

0

D

2

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  3. If sin x+sin y=3(cos y-cos x) then the value of sin 3 x+sin 3 y=

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  4. If sec theta+tan theta=1.5 then tan theta=

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  11. (cos 9^(circ)+sin 9^(0))/(cos 9^(circ)-sin 9^(circ))=

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  12. If sin theta+sin ^(2) theta=1 then cos ^(12) theta+3 cos ^(10) theta+3...

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  13. If cos (alpha+beta)=(4)/(5), sin (alpha-beta)=(5)/(13) and 0 lt alpha ...

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  14. If tan alpha=(1)/(3) and tan (beta)=(1)/(2) then tan (alpha+beta)=

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  15. cos (alpha+beta)=(3)/(5) and sin (alpha-beta)=(3)/(5) and 0 lt alpha, ...

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