# Trig Functions Cheat Sheet - Slac

The Trig Functions Cheat Sheet - Slac is a resource for students studying trigonometry. It provides a summary of the key trigonometric functions and their properties, equations, and identities.

## FAQ

Q: What are the basic trigonometric functions?
A: The basic trigonometric functions are sine, cosine, and tangent.

Q: What does sine represent?
A: Sine represents the ratio of the length of the side opposite an angle to the length of the hypotenuse in a right triangle.

Q: What does cosine represent?
A: Cosine represents the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Q: What does tangent represent?
A: Tangent represents the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Q: What is the unit circle?
A: The unit circle is a circle with a radius of 1, centered at the origin of a coordinate plane.

Q: What are the values of sine, cosine, and tangent for special angles?
A: For special angles 0°, 30°, 45°, 60°, and 90°, the values of sine, cosine, and tangent can be easily calculated.

Q: What is the Pythagorean identity?
A: The Pythagorean identity states that sin^2(x) + cos^2(x) = 1.

Q: What is the reciprocal identity?
A: The reciprocal identity states that cosec(x) = 1/sin(x), sec(x) = 1/cos(x), and cot(x) = 1/tan(x).

Q: What is the even-odd identity?
A: The even-odd identity states that sin(-x) = -sin(x), cos(-x) = cos(x), and tan(-x) = -tan(x).

Q: What is the cofunction identity?
A: The cofunction identity states that sin(pi/2 - x) = cos(x), cos(pi/2 - x) = sin(x), and tan(pi/2 - x) = 1/tan(x).