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What Is Cos 2 Equal To? [Solved]
The value of cos 2° is equal to the x-coordinate (0.9994). ∴ cos 2° = 0.9994.
Why does sine squared plus cosine squared equal 1?
Have you ever been told that sine squared plus
cos = 2
Solving
PreCalculus - Trigonometry: Trig Identities (31 of 57) Proof cos^2(x)=(1+cos2x)/2
In this video I will prove
