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[" If "cos theta=cos omega cos beta" .then "tan(9+alpha)/(2)tan(theta-alpha)/(2)" is cyural to "],[[" () "tan^(2)(alpha/2)," 2) "tan^(2)(beta/2)," 3) "tan^(2)(theta/2)," 4) "cot^(2)(beta/2)]]

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