Solved

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

Question 32

Multiple Choice

Without using a calculator, give the exact trigonometric function value with rational denominator.
-cos 60°

A) $\frac { 1 } { 2 }$
B) $\frac { \sqrt { 3 } } { 2 }$
C) $\sqrt { 3 }$
D) $\frac { \sqrt { 2 } } { 2 }$

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