Trig Unit Review

How many DEGREES are in a circle?

• 180^o

• 360^o

• π rad

• 2π rad

How many RADIANS are in a circle?

• 180^o

• 360^o

• π rad

• 2π rad

cosθ is positive in

• the 1st and 2nd quadrants
• the 1st and 3rd quadrants
• the 1st and 4th quadrants
• the 2nd and 3rd quadrants

What is the exact coordinates of  3π/4 on the unit circle?

• (−√2∕2, √2∕2)
• (−√2∕2, −√2∕2)
• (−√3∕2, −√2∕2)
• (√2∕2, −√2∕2)

Cosine equals 1 at what angle?

Find tangent of θ. USE SOH-CAH-TOA

• 4/5

• 3/5

• 3/4

• 5/4

Find sine of θ. USE SOH-CAH-TOA

• 4/5

• 3/5

• 3/4

• 5/4

Find x round to the nearest tenth.

• 46.1
• 4.9
• 73.5
• 68.6