Trig in the First Quadrant

Front

In the first quadrant, all the trig functions are

Back

positive

Front

What is the sine of 30 degrees?

Back

0.5

Front

What is the cosine of 60 degrees?

Back

0.5

Front

What is the tangent of 45 degrees?

Back

1

Front

What is the relationship between sine and cosine in the first quadrant?

Back

Sine and cosine are both positive and their values range from 0 to 1.

Front

What is the value of sin(0 degrees)?

Back

0

Front

What is the value of cos(0 degrees)?

Back

1

Front

What is the value of tan(0 degrees)?

Back

0

Front

What is the Pythagorean identity involving sine and cosine?

Back

sin²(θ) + cos²(θ) = 1

Front

What is the sine of 90 degrees?

Back

1