Posted by Anonymous on Tuesday, October 9, 2012 at 9:01pm.
I assume that Ø = 4 radians
2π radians = appr 6.28
3π/2 = 4.7
π rad = 3.14
so 4 radians must be in quadrant III
and the reference angle is 4 - π = .8584
check: since in III the tangent is positive,
tan 4 = 1.1578
tan .8584 = 1.155 , close enough
thankyou!
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