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[" 11.If "tan theta=(1)/(sqrt(7))," show...

[" 11.If "tan theta=(1)/(sqrt(7))," show that "((csc^(2)theta+sec^(2)theta))/((csc^(2)theta+sec^(2)theta))=(3)/(4)],[" 12.If "tan theta=(20)/(21)," show that "((1-sin theta+cos theta))/((1+sin theta+cos theta))=(3)/(7)]

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If tantheta=1/(sqrt7) , show that (cosec^(2)theta-sec^(2)theta)/(cosec^(2)theta+sec^(2)theta)=3/4

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