Question

Select all the correct answers.

If the measure of angle 0 is 2pi/3, which statements are true?

A. The measure of the reference angle is 60 degrees

B. Cos(0)= 3/2

C. The measure of the reference angle is 30 degrees.

D. Sin(0)= -1/2

E. Tan(0)= -3

F. The measure of the reference angle is 45 degrees.

Answer 1

The correct answers: tan 120= -√3.

The correct answer is (E)

What is an angle?

Angles are the angles between  bisecting lines or surfaces at or near their meeting point.

Given : $\theta$ = 2π/3

               = 2*180/3= 120

So, First and the fourth statement is not correct.

and, cos 120= -1/2

sin 120= √3/2

So, B and D statement is also wrong

tan 120= -√3.

Hence, the only correct statement is tan 120= -√3.

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