Find Trig Ratios for Any Angle on the Unit Circle

When finding the exact values for certain composite functions such as Sine, and it exceeds the radians, what can one do?

• Use the reference angle

• Use The angle given that exceeds the limit

If you have addition/subtraction trig identity that exceeds 90 degrees, you must use the reference angle of the new quadrant and the sign of the quadrant for the trig function

• Use the original angle without adjustment.

• Ignore the quadrant and use the angle directly.

• Always use a positive value for the trig function.

• Use the reference angle and the sign of the quadrant for the trig function.

Is it true that trig functions are at its roots just a ratio

• Trig functions are only used in calculus.

• Trig functions are unrelated to geometry.

• Trig functions are solely based on angles.

• Yes, trig functions are fundamentally ratios.

Based on the unit circle, what is the value of tan?

• y/r

• x/r

• r/y

• y/x

*

• csc x

• sec x

• cot x

• tan x

Given the Cos(x) = -2/3, then the Sec(x) = ?

• -2/3

• -3/2

• 3/2

• 2/3

What is tan 45°?

• 1
• ^√2/₂
• ^√3/₂
• ½

Match the trig function with it value on the unit circle:

• y coordinate

• Cos

• Tan

• Sin

• x coordinate

• Cot

Is it true that sine and cosine on their own cannot exceed 1 since the unit circle has a limit

• True

• Cosine can exceed 1

• Sine can exceed 1

• False

X is often known in trig functions as the

• domain

• the angle

• ratio