Posted by sally on Monday, April 12, 2010 at 12:18am.
Find all solutions w between 0 and 360, inclusive:
(a) cosw = cos(−340)
(b) cosw = sin 20
(c) sinw = cos(−10)
(d) sin w < − 1/2
(e) 1 < tanw

Trig  Damon, Monday, April 12, 2010 at 6:07am
a cos 20
b cos (9020) = cos 70
c sin (90  10) = cos 10 = sin 100
d 30 deg from x axis in quadrants 3 and 4 for sin so below 210 and 330
e above 45 degrees in quadrant 1 and below 225 in quadrant 3