Trig Fns - Identities

Simplify expressions with reciprocals using complementary results

Evaluate trig expressions using angle sum and difference identities

Expand expressions using angle sum and difference identities

Applications of angle sum and difference identities (deg)

Evaluate trig expressions using angle sum and difference identities (deg)

Expand expressions using angle sum and difference identities (deg)

Applications of angle sum and difference identities (rad)

Evaluate trig expressions using angle sum and difference identities (rad)

Expand expressions using angle sum and difference identities (rad)

Applications of angle sum and difference identities

Evaluate trig expressions using double and half angle identities (deg)

Evaluate trig expressions using double and half angle identities (rad)

Evaluate trig expressions using double and half angle identities (deg/rad)

Expand expressions using double and half angle identities

EXT: Apply double and half angle identities

Sums and differences as products (deg)

Sums and differences as products (rad)

Sums and differences as products (deg/rad)

Apply sum and difference and double angle identities

Solve equations using trigonometric identities

Prove and apply other trigonometric identities

Grade 12

Expand expressions using double and half angle identities

Interactive practice questions

Using the double angle identity for the cosine ratio, simplify the expression $\cos^2\left(4x\right)-\sin^2\left(4x\right)$cos2(4x)−sin2(4x).

Express your answer as a single trigonometric function.

Easy

1min

Outcomes

12F.B.3.2

Explore the algebraic development of the compound angle formulas, and use the formulas to determine exact values of trigonometric ratios

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