Evaluate Trig Function from Unit Circle

What function is positive in Q4?

• all trig functions

• sine

• cosine

• tangent

If I am looking on the unit circle at a point (x,y), how else can we write that point?

Think in terms of Trig. Let "t" be the angle measure.

Two angles with the same initial and terminal sides are called___________. They differ by a multiple of 2π or 360°.

• coterminal angles

• opposite angles

• complementary angles

• adjacent angles

Let θ be an nonquadrantal angle in standard

position.

True or False: The reference angle for θ is the

acute angle θ′ formed by the terminal side

of θ and the horizontal axis.

• True

• False

The picture depicts the graph of which function?

• f(x)= sec x

• f(x) = cos x

• f(x)= cot x

• f(x) = tan x

Evaluate the expression:

sin240°

• -√3/2

• √3/2

• -√2/2

• √2/2

What is this?

• the unit circle

• an apple

• a car

• a book

What do we call the graph of the equation x²+y²=1?

What is the cos(A)?

• a/b

• a/c

• b/c

• c/a

What trig functions are odd?

• f(x)= cos x

• f(x)= sin x

• f(x)= tan x

• f(x)= csc x

• f(x)= cot x