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  4. The value of sin 765° is (1/√n). Value of n is

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Q. The value of $\sin 765^{\circ}$ is $\frac{1}{\sqrt{n}}$. Value of $n$ is

Trigonometric Functions

Solution:

$\sin 765^{\circ}=\sin (360 \times 2+45)^{\circ}=\sin 45^{\circ}=\frac{1}{\sqrt{2}}$