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[" 3"" orven sce "theta=(12)/(12)" calcu...

[" 3"" orven sce "theta=(12)/(12)" calculate all other trigonometric ratios."],[" ilf "/_A" and "/_B" are acute angles such that "cos A=cos B" ,then show that "/_A=/_B],[" I licot "theta=(7)/(8)" ,evaluate ":(i)((1+sin theta)(1-sin theta))/((1+...))" Fig."8.13]

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