trigonometry

Related Questions

• In a $\Delta ABC,$ if $\frac{b+c}{11}=\frac{c+a}{12}=\frac{a+b}{13}$ , then $\cos C=$

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• $\frac{\sin \theta +\sin 2\theta }{1+\cos \theta +\cos 2\theta }=$

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• $\frac{\sqrt{2}-\sin \alpha -\cos \alpha }{\sin \alpha -\cos \alpha }=$

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• If $\sin A=\frac{4}{5}$and $\cos B=-\frac{12}{13},$where A and B lie in first and third quadrant respectively, then $\cos (A+B)=$

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• The top of a hill observed from the top and bottom of a building of height h is at the angle of elevation p and q respectively. The height of the hills is

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