trigonometry

Related Questions

• The smallest positive angle which satisfies the equation $2{{\sin }^{2}}\theta +\sqrt{3}\cos \theta +1=0$, is

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• $\sin 4\theta $can be written as

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• $ABCD$ is a rectangular field. A vertical lamp post of height 12m stands at the corner A. If the angle of elevation of its top from B is ${{60}^{o}}$ and from C is ${{45}^{o}}$, then the area of the field is

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• In a $\Delta ABC$ if the sides are $a=3,\,b=5$ and $c=4$ , then $\sin \frac{B}{2}+\cos \frac{B}{2}$ is equal to

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• The general value $\theta $ is obtained from the equation $\cos 2\theta =\sin \alpha ,$ is

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