trigonometry

Related Questions

• ${{\cos }^{2}}\left( \frac{\pi }{6}+\theta \right)-{{\sin }^{2}}\left( \frac{\pi }{6}-\theta \right)=$

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• The angle of elevation of the top of a tower from a point A due south of the tower is $\alpha $and from a point B due east of the tower is $\beta $. If $AB =d$, then the height of the tower is

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• The period of ${{\sin }^{4}}x+{{\cos }^{4}}x$ is

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• A ladder 5 metre long leans against a vertical wall. The bottom of the ladder is 3 metre from the wall. If the bottom of the ladder is pulled 1 metre farther from the wall, how much does the top of the ladder slide down the wall

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• If $\sin A+\cos A=\sqrt{2},$then ${{\cos }^{2}}A=$

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