1. If angle θ is in the first quadrant and cos(θ) = 3/5 then what is sin(θ)?
2. What is the value of cos(θ) if θ = 480°?
3. What is the value of 330° in radian measure?
4. The trigonometric expression (1 + cosθ)(1 – cosθ) can be simplified to?
5. The expression, tan (45° + x) can be expanded as?