PreCalculus 12 1 7.4 Pythagorean Identities Start with a circle: x 2 +y 2 =r 2 divide by r 2 to get Using sin cos y x and r r θ θ = = , this now becomes: Instead of dividing by r 2 , we can also divide by x 2 or y 2 to get two more Pythagorean identities: We will usually see these in the form of ____________________: i.e. 2 2 sin cos 1 θ θ + = à
4
Embed
7.4 Pythagorean Identities€¦ · 7.4 Pythagorean Identities Start with a circle: x2 + y2 = r2 divide by r2 to get Using sin cos yx and rr θθ==, this now becomes: Instead of dividing
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.