Trigonometry Essentials

What’s inside

• What is the exact value of sin(5π/6)?
• For which values of θ is tan(θ) undefined?
• Solve 2sin(x) = √3 for 0 ≤ x < 2π.
• What is the period of y = 3sin(2x − π)?
• Two sides of a triangle have lengths 5 and 7, and the included angle is 60°. What is the length of the opposite side?
• Which expression is equivalent to (1 − cos²θ)/sinθ, assuming sinθ ≠ 0?
• π radians is equivalent to 180 degrees.
• For every real angle θ, sin²θ + cos²θ = 1.