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If cos x + cos y + cos alpha = 0 and sin...

If `cos x + cos y + cos alpha = 0` and `sin x + sin y + sin alpha = 0`, then `cot((x+y)/(2))` =

A

`sin alpha`

B

`cos alpha`

C

`tan alpha`

D

`cot alpha`

Text Solution

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The correct Answer is:
D
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DIPTI PUBLICATION ( AP EAMET)-EAMCET - 2016 TS-Questions
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  6. The number of real linear functions f(x) satisfying f(f(x)) = x + f(x)...

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  9. Suppose A and B are two square matrices of same order. If A, B are sym...

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  12. The locus of z satisfying |z| + |z-1| = 3 is

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