The Inverse Sine, Cosine, and Tangent Functions Section 4.1.

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The Inverse Sine, Cosine, and Tangent Functions Section 4.1

Objectives Find the exact value of the inverse sine, cosine, and tangent functions. Find an approximate value of the inverse sine, cosine, and tangent functions.

Inverse Functions sin -1 x (Domain [-π/2, π/2]) cos -1 x (Domain [0, π]) tan -1 x (Domain [-π/2, π/2]) Meaning: The sine/cosine/tangent of what angle equals x?

Properties sin(sin -1 x) = sin -1 (sin x) = x cos(cos -1 x) = cos -1 (cos x) = x tan(tan -1 x) = tan -1 (tan x) = x

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