What is the exact value of \( \cos \left(\frac{10 \pi}{3}\right) \) a) \( \frac{\sqrt{3}}{2} \) b) \( \frac{1}{2} \) c) \( -\frac{1}{2} \) d) \( -\frac{\sqrt{3}}{2} \)

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

Question 1 (2 points) Suppose that \( \sin (a)=4 / 8 \) and \( \cos (b)=1 / 8 \) define in the first quadrant, determine \( \cos (a-b) \). (round to 4 decimal places)

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

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

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: