1.

If cos x - sin alpha cot beta sin x = cos alpha then the value of tan(x//2) is

Answer»

`-TAN (alpha/2)COT(beta/2)`
`tan (alpha/2)tan(beta/2)`
`-cot (alpha/2)tan(beta/2)`
`cot (alpha/2)cot (beta/2)`

ANSWER :A::B


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