Answer numbers 16 to 18 16.   Which of the following angles lies in the third quadrant and has a reference angle equal to 30∘? A.−30∘  B.600∘  C.−210∘  D.−870∘  17.   What is 690∘ in radian measure? A.​9π/3​​  B.​15π/4​​ C.​10π/3​​  D.​23π/6 18.   Which of the following is coterminal with −7π/6 ? A.−30∘  B.210∘  C.150∘  D.135∘

Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter73: Achievement Review—section Seven
Section: Chapter Questions
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Answer numbers 16 to 18

16.   Which of the following angles lies in the third quadrant and has a reference angle equal to 30∘?

A.−30∘ 
B.600∘ 
C.−210∘ 
D.−870∘ 

17.   What is 690∘ in radian measure?

A.​9π/3​​ 
B.​15π/4​​
C.​10π/3​​ 
D.​23π/6

18.   Which of the following is coterminal with −7π/6 ?

A.−30∘ 
B.210∘ 
C.150∘ 
D.135∘
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