College Algebra Trigonometry

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1
• sqt2/2
• sqt3/2
• 1/2

Based on your unit circle sin(30^o)=

• sqt2/2
• 1/2
• 1
• sqt3/2

Based on your unit circle cos(30^o)=

• 1
• 1/2
• sqt3/2
• sqt2/2

cos(60°)

• 0
• 1/2
• √3/2
• 1

sin(0°)

• 0
• 1/2
• √3/2
• 1

cos 90

• 0
• 1
• -1
• undefined

cos(π)=

• 0
• 1
• -1
• 1/2

Convert 140⁰ into radians

• 7/9π
• 6/11π
• 12/17π
• 4/7π

Convert 3π/4 to degrees

• 147.3°
• 135°
• 125°
• 173.8°

Find x.

• 10
• 5
• 20
• 3