If cos theta=(cos alpha-cos beta)/(1-cos alpha*cos beta) then Tan^(2)((theta)/(2))*Tan^(2)((beta)/(2))=- (A) Tan(alpha)/(2) (B) cos(alpha)/(2) (C) cot^(2)(alpha)/(2) (D) Tan^(2)(alpha)/(2)
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the squre root of 9/25 is 3/5
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