Right Triangle Trig and Unit Circle

Solve for x. Round to the nearest tenth.

• 15.3

• 16.6

• 24.1

• 24.3

Which trigonometric ratio should you use?

• Tangent Ratio

• Sine Ratio

• Cosine Ratio

• Any ratio

What is the correct ratio?

• 7/24

• 24/7

• 7/25

• 24/25

What is 7π/4 radians in degrees?

• 300

• 135

• 315

• 45

Solve
cos²θ = ½ 
on θ∈[0, 2π)

• θ = π /4, 7π /4

• θ = π /4, 3π /4

• θ = 3π /4, 5π /4

• θ = π /4, 3π /4, 5π /4, 7π /4

• 0

• 1

• -1

• 0

• 0

• 1

• -1

• 1

• -1

• 0

Solve for x.

• 24.20

• 4.92

• 290.4

• 29.75