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Restrict the domain of a trig function to make it invertible
Worksheet
Grade Level
Trigonometry
TRIG.64 Restrict the domain of a trig function to make it invertible
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Why are tangent branch intervals usually open, such as (-pi/2, pi/2), instead of closed?
A
The endpoint angles are vertical asymptotes where tangent is undefined.
B
Open intervals make tangent stop being periodic.
C
Tangent is only defined for negative x-values.
D
Closed intervals would make the inverse range equal [-1, 1].
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