Suppose that \( \frac{\pi}{2} \leq \theta \leq \pi, \sin (\theta)=4 / 10 \), find \( \cos (\theta)=\ldots \) Your Answer:

MATHS IN ACTION REVIEW 1. Louis is a firefighter. He regularly takes the helicopter to check for fires or to help people in difficulty. Today, he heads out from the base in a direction of \( 290^{\circ} \). Mark that heading on the diagram. In which direction is he heading (north, northeast, east, southeast, south, southwest, west, or northwest)?

Answer Question 2 (2 points) Suppose that \( \sin (\mathrm{a})=4 / 7 \) and \( \cos (\mathrm{b})=3 / 9 \) define in the first quadrant, determine \( \cos (\mathrm{a}+\mathrm{b}) \). (round to 4 decimal places) Your Answer:

Question 26 (3 points) \( \checkmark \) Saved Suppose that \( \sin (\theta)=1 / 8 \). What \( \sec (\theta)=\ldots \)...... (round to 3 decimal places)

Answer Question 26 (3 points) Suppose that \( \sin (\theta)=1 / 8 \). What \( \sec (\theta)=\ldots \)

Question 1 (2 points) Suppose that \( \theta=\arcsin (1 / 7) \). What is \( \sin (2 \theta) \) ? (round to 4 decimals) Your Answer: