Trigonometry
posted by Rodrick .
Stuck :(
1. Simplify (5√36)(2+√1)
A. 16 − 7i
B. 16 + 7i
C. 4 + 7i
2. Choose the point that lies on the curve r = 2 – 3 sin θ.
A. (5, 3π/3)
B. (2, π)
C. (1, π/2)
3. Which of the following is not an approximate solution of x5 – 1 = 0?
A. 0.3090 – 0.9511i
B. 0.8090 + 0.5878i
C. 0.3090 + 0.9511i
D. –0.8090 + 0.5878i
4. Simplify (√23i)²
A. 76√2i
B. 29i
C.56√2i
5. Simplify (2√cis47°)(3√8cis89°)
A. 48 cis 223°
B. 48 cis 136°
C. 12 cis 136°

(A)
none (2,π) is, but not (2,π)
(B)
(A)
(B) if you meant (2√8 cis47°)(3√8 cis89°)