AP PreCalc / Inverse Trigonometric Identities (arccos(cos)) or (arcsin(sin))

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6 Terms

1
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Formula for finding sin-1(sin(π))

sin(π - x) = sin x

2
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Formula for finding cos-1(cos(π))

cos(2π - x) = cos x

3
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Formula for finding tan-1(tan(π))

tan(x + π) = tan x

4
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SOLVE: sin-1(sin(7π/6))

sin(π - 7π/6) = sin(-π/6)

5
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SOLVE: cos-1(cos(7π/6))

cos(2π - 7π/6) = cos(5π/6)

6
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SOLVE: tan-1(tan(7π/6))

tan(π + 7π/6) = tan(13π/6) = tan(π/6)