Question

$\sin \, 765^{\circ}$ is equal to

• A. 1
• B. 0
• C. $\frac {\sqrt{3} } {2} $
• D. $\frac {1}{2}$
• E. $\frac {1} {\sqrt{2}}$

Answer 1

Answer: (E)

$\sin 765^{\circ}$
$=\sin \left(720^{\circ}+45^{\circ}\right)=\sin 45^{\circ}$
$=\frac{1}{\sqrt{2}}$