Solve Trigonometric Unit Circle

What is sin^-1(1/2)?

• 150

• 120

• 60

• 30

Based on your unit circle sin(0^o)=

• 1

• -1

• 0

• 1/2

Where does the graph of y=sin(x) begin its first cycle?

• (0,0)

• (1,0)

• (0,Pi)

• (1, Pi)

• 1
• 2
• 3
• 4

• undefined

Answer explanation

What is the length of the hypotenuse of the triangle? (Think about it as a radius)

OP=___

Label OP on your paper.

• undefined

Answer explanation

Using θ as a reference angle, mark the triangle sides as Opp, Adj, and Hyp. Label these on the triangle on your paper.

• Opp

• x

• Hyp

• y

• Adj

• OP

Using θ as a reference angle, mark the triangle sides as Opp, Adj, and Hyp. Label these on the triangle on your paper.

• Hyp

• OP

• Adj

• y

• Opp

• x

The Unit Circle has four quadrants such that:

• All quadrants have 90 degrees

• Quadrant IV is between π and 3π/2 radians

• Quadrant III is between 3π/2 and 2π and radians

• Quadrant I is where the acute angles are