HPC Ch 9 Review

Use a double-angle or half-angle identity to find the exact value of each expression
sin θ = −3/5 and 3π/2 < θ < 2π Find tan θ/2

• -1/3
• -√3
• √3/3
• -1

Use the Half-angle formulas to find the exact value of each expression
sin 22.5º