# Trig

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Find the co terminal angle for 15pi/4

• Trig -

15π/4 = 675°
which is co-terminal with 675-360 or 315°
or 7π/4

notice that 15π/4 - 2π = 7π/4

• Trig -

Nonnegative coterminal is (pi)/4
Negative coterminal is -(pi)/4

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