trigonometry

Related Questions

• A person is standing on a tower of height $15(\sqrt{3}+1)\,m$ and observing a car coming towards the tower. He observed that angle of depression changes from 30° to 45° in 3 sec. What is the speed of the car

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• $\frac{\sin 3\theta +\sin 5\theta +\sin 7\theta +\sin 9\theta }{\cos 3\theta +\cos 5\theta +\cos 7\theta +\cos 9\theta }=$

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• In a $\Delta ABC,$ $A:B:C$. Then $[a+b+c\sqrt{2}]$ is equal to

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• The horizontal distance between two towers is 60 metres and the angular depression of the top of the first tower as seen from the top of the second, is 30°. If the height of the second tower be 150 metres, then the height of the first tower is

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• If $A={{\sin }^{2}}\theta +{{\cos }^{4}}\theta ,$ then for all real values of $\theta$

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