The unit circle and radians

Question 1

Convert 270° to radians (in terms of π).

• A. 2π
• B. 3π/2
• C. 2π/3
• D. 3π/4

Question 2

Is cos 150° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 3

Convert 120° to radians (in terms of π).

• A. π
• B. π/4
• C. 2π/3
• D. 2π

Question 4

Is cos 300° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 5

Convert 150° to radians (in terms of π).

• A. π/4
• B. 5π/6
• C. 2π
• D. 2π/3

Question 6

Is sin 330° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 7

Convert 180° to radians (in terms of π).

• A. π/3
• B. 2π/3
• C. 3π/2
• D. π

Question 8

Is sin 210° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 9

Convert 180° to radians (in terms of π).

• A. 3π/4
• B. π/2
• C. 2π/3
• D. π

Question 10

Is cos 180° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 11

Convert 60° to radians (in terms of π).

• A. π/6
• B. π/3
• C. 5π/6
• D. 2π/3

Question 12

Is sin 315° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 13

Convert 135° to radians (in terms of π).

• A. π/4
• B. 3π/4
• C. π/2
• D. 2π

Question 14

Is cos 135° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative

Question 15

Convert π/4 radians to degrees.

Answer 

Question 16

Is cos 270° positive, zero or negative?

• A. Positive
• B. Zero
• C. Negative