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19 June, 15:29

Evaluate csc330°.

A: - 2sqrt3/3

B: - 2

C: 2

D: 2sqrt3/3

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Answers (1)
  1. 19 June, 19:27
    0
    B: - 2

    Step-by-step explanation:

    The reference angle for 4th-quadrant angle 330° is 30°. The sine is negative in the 4th quadrant, so ...

    csc (330°) = 1/sin (-30°) = - 1/sin (30°) = - 1 / (1/2) = - 2
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