Question

Which of the following is a coterminal angle of 138°? A.) 438° B.)-136° C.) -582° D.) 228°

Answer 1

Answer: I think the correct answer is D.

Answer 2

• C) -582°

Explanation:

Coterminal angles sum to 360°n, where n is an integer.

Given angle is 138°

The difference is:

• A) 438° - 138° = 300°, no
• B) -136° - 138° = -274°, no
• C) -582° - 138° = -720° = -2(360°), yes
• D) 228° - 138° = 90°, no