44.5o , 224.5o
123.5o , 190.5o
135.5o , 213.5o
135.5o , 224.5o
Correct answer is D
cos x = -0.7133
x = cos −1(0.7133)
= 44.496o
x = 180 - 44.495o
x = 135.5o
and x = 180o + 44.495o
= 224.5o
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