Use a negative-angle identity to write an equivalent trigonometric expression involving a positive angle.cos 
A. -cos 
B. cos 
C. 1 - cos 
D. sin 
Answer: B
Mathematics
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Find all cube roots of the complex number. Leave answers in trigonometric form.-125i
A. 5 cis 90°, 5 cis °210, 5 cis 330° B. 5 cis 30°, 5 cis °60, 5 cis 90° C. 5 cis 90°, 5 cis °180, 5 cis 270° D. 5 cis °210, , 5 cis 270°, 5 cis 330°
Mathematics
Given C = 122
, a = 25, and c = 18, use the Law of Sines to solve the triangle (if possible) for the value of b. If two solutions exist, find both. Round answer to two decimal places.
A. b = 13.97 B. b = 15.34 and 19.86 C. b = 9.65 D. b = 8.72 and 12.09 E. not possible
Mathematics
Divide, if possible. Write the answer in simplest form.5
÷ 3
A. 1
B. 2
C. 1
D. 1
Mathematics
Decide if the given ordered pair is a solution to the inequality.x + y > 2: (-2, 5)
A. Yes B. No
Mathematics