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  4. The value of sin 10° sin 30° sin 50° sin 70° is :-

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Q. The value of $\sin \; 10^{\circ} \; \sin 30^{\circ} \; \sin 50^{\circ} \; \sin 70^{\circ}$ is :-

JEE MainJEE Main 2019Trigonometric Functions

Solution:

$\left(\sin10^{\circ} \sin30^{\circ} \sin70^{\circ}\right)\sin30^{\circ} $
$ \frac{1}{4} \left(\sin30^{\circ}\right) = \frac{1}{4} . \frac{1}{4} = \frac{1}{16}$