Without using a calculator, give the exact trigonometric function value with rational denominator.
-cot 45°
A) 1
B) $\frac { 1 } { 2 }$
C) $\sqrt { 2 }$
D) $\frac { 2 \sqrt { 3 } } { 3 }$

Question

Without using a calculator, give the exact trigonometric function value with rational denominator.
-cot 45° 
A) 1
B) $\frac { 1 } { 2 }$
C) $\sqrt { 2 }$
D) $\frac { 2 \sqrt { 3 } } { 3 }$

Quizplus · Accepted Answer

The cotangent of 45° is equal to 1 because cotangent is the reciprocal of tangent, and tan(45°) = 1, making cot(45°) = 1/1 = 1.

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 $\frac { 1 } { 2 }$