The Pythagorean identity
Use $\sin^2\theta + \cos^2\theta = 1$ to find one ratio from another, and let the quadrant decide the sign.
About 20 minutes6 activities Paper packet
Use $\sin^2\theta + \cos^2\theta = 1$ to find one ratio from another, and let the quadrant decide the sign.
About 20 minutes6 activities Paper packet