8π / 7= π + (1/7)π
so just a bit more than π,
so in quadrant III
here is a "sneaky way"
set your calculator to radians
take sin 8π/7 to get a negative
take cos 8π/7 to get a negative
the only quadrant in which both sine and cosine are negative is III
Determine the quadrant in which an angle, θ, lies if θ = 8π / 7
a. 3rd quadrant
b. 1st quadrant
c. 4th quadrant
d. 2nd quadrant
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2 answers