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

Question

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

Quizplus · Accepted Answer

The cosecant of an angle is the reciprocal of the sine of that angle. Since sin(30°) = 1/2, csc(30°) = 1/(sin(30°)) = 1/(1/2) = 2.

Without Using a Calculator, Give the Exact Trigonometric Function Value 12\frac { 1 } { 2 }21​

Without Using a Calculator, Give the Exact Trigonometric Function Value $\frac { 1 } { 2 }$