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Asked by Joe Daddy

Find the 6 Trig ratios of -7Pie/3
14 years ago

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Answered by Reiny
-7π/3 is coterminal with - π/3 or +5π/3
(-420° is coterminal with -60° or +300°)

using the reference of π/3, and the CAST rule

sin ( -7π/3) = -√3/2
cos ( -7π/3) = +1/2
tan ( -7π/3) = -√3

I will let you state the other three.
14 years ago
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Find the 6 Trig ratios of -7Pie/3

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