MA.912.T.1.6
Prove the Double-Angle, Half-Angle, Angle Sum and Difference formulas for sine, cosine, and tangent. Apply these formulas to solve problems.
Khan Academy ResourcesTrig identity referenceUsing the trig angle addition identitiesFind trig values using angle addition identitiesTrig angle addition identitiesProof of the tangent angle sum and difference identitiesUsing trig angle addition identities: manipulating expressionsUsing the cosine double-angle identityProof of the sine angle addition identityProof of the cosine angle addition identityUsing the tangent angle addition identityFinding trig values using angle addition identitiesUsing trig angle addition identities: finding side lengthsUsing the cosine angle addition identity

1-on-1 AI tutoring aligned to MA.912.T.1.6. Instant help for students, real-time insights for teachers.
Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.
Free for teachers, forever →