PRE CALCULUS Trigonometry

Question 1

What is sin(30°)?

Accepted Answer

1/2

Answer

0

Answer

√2/2

Answer

√3/2

Question 2

What is the unit circle?

Accepted Answer

A circle with radius 1 centered at the origin, used to define trigonometric functions for all angles

Answer

A circle with diameter 1

Answer

Any circle used in calculations

Answer

A circle in unit conversion

Question 3

What is the period of the standard sine function y = sin(x)?

Accepted Answer

2π

Answer

π

Answer

π/2

Answer

4π

Question 4

What is the Pythagorean identity?

Accepted Answer

sin²θ + cos²θ = 1

Answer

a² + b² = c²

Answer

tan θ = sin θ / cos θ

Answer

sin θ = cos(90° - θ)

Question 5

What is the tangent of an angle in terms of sine and cosine?

Accepted Answer

tan θ = sin θ / cos θ

Answer

tan θ = cos θ / sin θ

Answer

tan θ = sin θ × cos θ

Answer

tan θ = sin θ + cos θ

Question 6

In which quadrant are both sine and cosine positive?

Accepted Answer

Quadrant I

Answer

Quadrant II

Answer

Quadrant III

Answer

Quadrant IV