Desmos | Graphing Calculator

have you seen this result?
www.desmos.com/calculator/8...

if not... can you prove it? #iTeachTrig 📐

RESULT
for A, B, C that sum to 180° (e.g. interior angles of a triangle):

sin²(A) =
sin²(B) + sin²(C) - 2cos(A)sin(B)sin(C)

#MathSky 🧮 #iTeachMath ♾️

[25-26] Precal PS 1 [Dickman] Problem 1) a) There are different ways to combine trigonometric functions, for example, we have seen that sin(x)/cos(x) gives us the tangent function. Below is a graph of cos(x) multiplied by sin(x): ...

messing with a new problem set for #precalc so if you want to steal the materials OR point out any errors, it will be appreciated!
docs.google.com/document/d/1...

thanks in advance 🙏🏻 #iTeachMath x #MathSky

(not sure what hashtags are used for trig but #iTeachTrig unite!)