The unit circle and trigonometric equations Problem set B Answers

(4.18, −4.98)

\(\sin\theta=-\frac{35}{37}\)

1. (a) \(\cos\theta=-0.96\)
2. (b) \(\tan\theta=\frac{7}{24}\)

1. (a) 143°
2. (b) 323°
3. (c) 4.98

1. (a) x = 27.4° or 152.6°
2. (b) x = 128.3° or 231.7°

x = 0.215 or 1.356

1. (a) 4.73 m
2. (b) t = 3.95 and t = 8.45
3. (c) 4.50 hours

1. (a) (−12.62, 21.58)
2. (b) 0.92 seconds

1. (a) y = −0.6
2. (b) θ = 5.640
3. (c) \(\tan\theta=-\frac34\)

1. (a) \(\tan x=\frac{5}{2}\)
2. (b) x = 68.2° or 248.2°