Know and use trigonometric identities to find values of trig functions.
Prove and apply trigonometric identities.
No resources have been tagged as aligned with this standard.
Given a point on a circle centered at the origin, recognize and use the right triangle ratio definitions of sin θ, cos θ, and tan θ to evaluate the trigonometric functions.
Given the quadrant of the angle, use the identity sin² θ + cos² θ = 1 to find sin θ given cos θ, or vice versa.