Csc (theta) , if cos (theta) = -2/3 ; 180 < theta < 270
2 answers:
Answer: D on edge
Step-by-step explanation:
Opposite side = sqrt (3^2 - 2^2 ) = sqrt5
sin theta = -sqrt 5 / 3 as the sine is negative in the 3rd quadrant
csc theta = - 3 / sqrt5
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