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[" (a) "cos pi^(@)+[" (b) "sin7^(@)," (c) "sin61^(@)" (d) "-sin25^(@)],[" 34.If "y=(2sin alpha)/(1+cos alpha+sin alpha)" ,then value of "(1-cos alpha+sin alpha)/(1+sin alpha)" is "],[[" (a) "(y)/(3)," (b) "y," (c) "2y," (d) "(3)/(2)x]]]

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