Evaluate Sin Cosine Tangent with Double Angle Formulas

Evaluate sine, cosine, and tangent with double angle formulas

Video Timestamp

01:08 Rewrite as a double angle to prove sin 2(30) not equal 2sin 30

03:34 Evaluate: cos(2u) = cos squared u - sin squared u

08:31 Evaluate tangent problem

11:26 Using double angles with triangles

12:35 Evaluate double angles sin2x cos2x

18:35 Evaluate given co-functions
This video goes with following Math Standard: Prove and apply trigonometric identities.
Prove addition, subtraction, double and half-angle formulas for sine, cosine, and tangent and use them to solve problems.
Georgia Math Standard, MGSE9-12.F.TF.9

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