trigonometry

Related Questions

• The shadow of a tower is found to be 60 metre shorter when the sun’s altitude changes from ${{30}^{o}}$ to ${{60}^{o}}$. The height of the tower from the ground is approximately equal to

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• If$\cos 6\theta +\cos 4\theta +\cos 2\theta +1=0$, where $0<\theta <{{180}^{o}}$, then $\theta $ =

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• In a $\Delta ABC$ , if ${{c}^{2}}+{{a}^{2}}-{{b}^{2}}=ac$ , then $\angle B=$

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• If $2{{\cos }^{2}}x+3\sin x-3=0,\,\,0\le x\le {{180}^{o}}$, then $x =$

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