trigonometry

Related Questions

• $\sin {{163}^{o}}\cos {{347}^{o}}+\sin {{73}^{o}}\sin {{167}^{o}}=$

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• If $\tan \alpha $ equals the integral solution of the inequality $4{{x}^{2}}-16x+15<0$ and $\cos \beta $ equals to the slope of the bisector of first quadrant, then $\sin (\alpha +\beta )\sin (\alpha -\beta )$is equal to

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• If $\theta $is an acute angle and $\sin \frac{\theta }{2}=\sqrt{\frac{x-1}{2x}}$, then $\tan \theta $ is equal to

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• In a right triangle $AC=BC$ and D is the mid point of AC cotangent of angle $DBC$ is equal to

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• The value of $\cos y\cos \left( \frac{\pi }{2}-x \right)-\cos \left( \frac{\pi }{2}-y \right)\cos x$ $+\sin y\cos \left( \frac{\pi }{2}-x \right)+\cos x\sin \left( \frac{\pi }{2}-y \right)$ is zero, if

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