GRE Quiz | GRE Quantitative 2 | Question 13

This is multiple correct questions (one or more than one choices are correct).

Which of the following is/are not correct?

(A) Sine 1250′ is positive
(B) Tangent 765′ is negative
(C) Cotangent 1560′ is positive
(D) Cosine 2780′ is positive
(E) Secent 1844′ is negative


Answer: (B) (C) (D) (E)

Explanation: (A): 1250 mod 360 = 170 and sin 170′ = 0.1736

(B): 765 mod 360 = 45 and tan 45′ = 1

(C): 1560 mod 360 = 120 and cot 120′ = -√3 / 3

(D): 2780 mod 360 = 260 and cos 260′ = -0.1736

(E): 1844 mod 360 = 44 and sec 44′ = 1.00015671591

So, option (B), (C), (D) and (E) are correct.

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