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" B-13.If "tan alpha=(1)/(7),sin beta=(1...

" B-13.If "tan alpha=(1)/(7),sin beta=(1)/(sqrt(10))," Prove that "alpha+2 beta=(pi)/(4)," where "0

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If tan alpha=(1)/(7),sin beta=(1)/(sqrt(10)), Prove that :alpha+2 beta=(pi)/(4), where 0

If tan alpha=(1)/(7),sin beta=(1)/(sqrt(10)), prove that alpha+2 beta=(pi)/(4), where 0

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