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The value of   $\sin 120^{o}+\sin 780^{o}-\cos 360^{o}$

                       $=(\sin (90^{o}\times 2)-60^{o})+\left ( \sin \left ( 90^{o}\times 8 \right )+60^{o} \right )-\left ( \cos (90^{o}\times 4)+0^{o} \right )$

                       $=\frac{\sqrt{3}}{2}+\frac{\sqrt{3}}{2}-1=0.73$

right??
in Numerical Ability by Veteran (113k points)
edited by | 36 views
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You can use a calculator to verify these things.
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My ans. is correct or not?? In calculator giving diff ans
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It is correct.

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