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[" 5.Given sec "theta=(-1)/(12)" ,calcul...

[" 5.Given sec "theta=(-1)/(12)" ,calculate all other trigonometric ratios."],[" 6.If "/_A" and "/_B" are acute angles such that "cos A=cos B" ,then show that "/_A=/_B" ."],[" 1.If "cot theta=(7)/(a)" ,evaluate: "(1+sin theta)(1-sin theta)]

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