Without using a calculator, give the exact trigonometric function value with rational denominator.
-$\sin 30 ^ { \circ }$
A) $\sqrt { 3 }$
B) $\frac { \sqrt { 2 } } { 2 }$
C) $\frac { 1 } { 2 }$
D) $\frac { \sqrt { 3 } } { 2 }$

Question

Quizplus · Accepted Answer

The sine of 30 degrees is known to be exactly 1/2, which is a basic trigonometric value.

Without Using a Calculator, Give the Exact Trigonometric Function Value sin⁡30∘\sin 30 ^ { \circ }sin30∘

Without Using a Calculator, Give the Exact Trigonometric Function Value $\sin 30 ^ { \circ }$