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Review the diagram of the unit circle.
y
R (cos(u+v), sin(u+v))
Based on the diagram, which equation can be
simplified to derive the cosine sum identity?
(costu+v)-1)+(sin(u+v)-0)=√(cos(u) − 1)² + (sin(u) — 0)*
-U
Q (cos(u), sin(u))
x
P(1, 0)
S (cos(-v), sin(-v))
(cos(u+v)-1)+(sin(u+v)-0)=√(cos(-)-1)²+(sin(-)-0)
√(cos(u + v) − 1)² + (sin(u+M-0)=√(cos(u)-cost-v)+(sin(u)-sin(-)
{(cos(u + v) − 1)² + (sin(u+v)-0)=√(cos(u+)-costul)² + (sin(u+v)-sin(u)?
