Find all cube roots of the complex number. Leave answers in trigonometric form.125i
A. 5 cis 30°, 5 cis 150°, 5 cis 270°
B. 5 cis 60°, 5 cis 180°, 5 cis 300°
C. 1, -1, -i
D. 5 cis 0°, 5 cis 120°, 5 cis 240°
Answer: A
Mathematics
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Establish the identity.
+ 
= -2 csc ?
What will be an ideal response?
Mathematics
Find the exact value of the expression.cos (165°) cos (45°) + sin (165°) sin (45°)
A. -2
B. - 
C. - 
D. - 
Mathematics
Use a calculator to evaluate the expression. Round the answer to three decimal places.-(-1.57)-2
A. -0.406 B. 2.465 C. 0.406 D. -2.465
Mathematics
Solve the problem.Jake has a cable that is 69 feet long. He wants to cut it into pieces that are 6.9 feet long. How many 6.9-foot pieces will he get from the cable?
A. 11 pieces B. 10 pieces C. 9 pieces D. 100 pieces
Mathematics