Answer: r = 4 sec θ
Explanation: Using: x = r cos θ then r cos θ = 4 ⇒ r = 4 cos θ = 4 sec θ
6:15:21
6:15:21= 2:5:7
<em>(when divided by 3)</em>
Answer:
B. 180°
Step-by-step explanation:
Rotate AB 180 degrees in the clockwise direction.