Please help me solve the equation?

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Answer 1 · 2018-05-21T19:57:01

first #120^0, 300^0#

second #135^0, 225^0#

#3 tan theta = - sqrt 3#

#tan theta = - sqrt 3/3#

#theta = -60^0 + k * 180^0#

second

#-2 cos theta = 1#

#cos theta = -1/2#

#theta = 180^0 ± 45^0 + k * 360^0#