trigonometry

Related Questions

• If ${{\tan }^{2}}\theta =2{{\tan }^{2}}\varphi +1,$ then $\cos 2\theta +{{\sin }^{2}}\varphi $ equals

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• The minimum value of $9{{\tan }^{2}}\theta +4{{\cot }^{2}}\theta $is

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• In a $\Delta ABC$ ,side b is equal to

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• In any $\Delta ABC$ if $a\cos B=b\cos A$ , then the triangle is

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• $\frac{{{\cot }^{2}}15{}^\circ -1}{{{\cot }^{2}}15{}^\circ +1}=$

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