Whenever possible, find the exact values of the trigonometric functions of θ if θ is in standard position and satisfies the stated condition.
(a) The point (30, – 40) is on the terminal side of θ.
(b) The terminal side of θ is in quadrant II and is parallel to the line 2x + 3y + 6 = 0.
(c) The terminal side of θ is on the negative y-axis.
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