Unit 7 Unit Circle and Trig Functions

Front

In which quadrants is sinθ positive?

Back

sinθ is positive in the 1st and 2nd quadrants.

Front

What is the fifth daughter's name in the riddle: Mary’s father has 5 daughters – Nana, Nene, Nini, Nono?

Back

The fifth daughter's name is Mary.

Front

Convert 150° to radians.

Back

150° is equal to 5π/6 radians.

Front

What are the exact coordinates of 3π/4 on the unit circle?

Back

The coordinates of 3π/4 are (−√2/2, √2/2).

Front

What is sec 3π/2?

Back

sec 3π/2 is undefined.

Front

What is the definition of the unit circle?

Back

The unit circle is a circle with a radius of 1 centered at the origin of a coordinate plane.

Front

What is the value of cos(0°)?

Back

cos(0°) = 1.

Front

What is the value of sin(90°)?

Back

sin(90°) = 1.

Front

What is the relationship between degrees and radians?

Back

180° is equal to π radians.

Front

What is the value of tan(45°)?

Back

tan(45°) = 1.