Right Triangle Trigonometry in the Unit Circle

What is the value of x?

• 9.17

• 98.13

• 0.11

• 26.69

Find Cos(A) as a decimal rounded the the nearest ten-thousandth.

Identify the Positive angle in both radians and degrees that represent point H.

Identify the Positive angle in both radians and degrees that represent point D.

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

Solve for x.

• 24.20

• 4.92

• 290.4

• 29.75

Fill in the blank...
SOH ___ TOA

• COH

• CAH

• COA

• CHA

What is the value of x?

• 960

• 30.98

• 43.91

• 14.24