Sine and Cosine Function Values

Front

What are the coordinates of a point on a circle of radius r at an angle θ?

Back

The coordinates are given by (r cos(θ), r sin(θ)).

Front

Evaluate cos(π).

Back

-1

Front

What are the coordinates of point Q on a circle of radius 15 at an angle π/4?

Back

The coordinates are (15 cos(π/4), -15 sin(π/4)).

Front

Evaluate sin(π/4).

Back

√2/2

Front

Evaluate cos(5π/4).

Back

-√2/2

Front

What is the value of sin(3π/2)?

Back

-1

Front

What is the value of cos(0)?

Back

1

Front

What is the value of sin(π)?

Back

0

Front

What are the coordinates of point Q on a circle of radius 9 at an angle 5π/4?

Back

The coordinates are (9 cos(5π/4), 9 sin(5π/4)).

Front

What is the relationship between sine and cosine for complementary angles?

Back

sin(θ) = cos(90° - θ).