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Which of the following values are positive?
$(a) \cos 120 °$
$(b) \sin 210 °$
$(c) \tan 240 °$
$(d) \cos 315 °$

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(a) and (d)

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detailed solution

Correct option is B

240°lies in 3 rd quadrant and tan in 3rd quadrant is positive.315° lies in 4th quadrant and cos in 4th quadrant is positive.

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Which of the following values are positive? (a) cos120° (b) sin210° (c) tan240° (d) cos315°

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Ready to Test Your Skills?

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Which of the following values are positive?
$(a) \cos 120 °$
$(b) \sin 210 °$
$(c) \tan 240 °$
$(d) \cos 315 °$