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If cos alpha, sin beta, sin alpha are in...

If `cos alpha, sin beta, sin alpha` are in increasing G.P. , then roots of `x^2 + 2 cot beta , x + 1 = 0` are (where `alpha, beta in R`)

A

equal

B

real

C

imanginary

D

greater than 1

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The correct Answer is:
B
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OBJECTIVE RD SHARMA ENGLISH-QUADRATIC EXPRESSIONS AND EQUATIONS -Chapter Test
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