Which of the following is equivalent to ?

(A) 1

(B) sin n

(C) cos n

(D) cot n

(E) csc n

In the following figure, what is the midpoint of ?

(A) (B) (C) (D) (E)

**Correct Answer: A**

Line T intersects parallel lines m and n. Angle measures are as shown in the figure below. What is the degree measure of a?

（A）10° （B） 80° （C） 90° （D） 100° （E） 110°

**Correct Answer: D**

A scientist performs an experiment in which she measures four values two times each, with the following results:

(F) 0.5(G) 1(H) π(J) 2π(K) 4π

**Correct Answer: H**

### More ACT Math Exam Questions

- 1
A right triangle, shown below, has a longer leg measuring 16 centimeters. How long is the hypotenuse of the triangle, in centimeters?

- 2
In the figure below, ray was constructed starting from rays and . By using a compass D and G were marked equidistant from E on rays and . The compass was then used to locate a point F, distinct from E, so that F is equidistant from D and G. For all constructions defined by the above steps, the measures of ∠DEF and ∠GEF:

- 3As shown in the standard (x,y) coordinate plane below, A (2,4) lies on the circle with center L (10,-2) and radius 10 coordinate units. What are the coordinates of the image of A after the circle is rotated 90° counterclockwise (?) about the center of the circle?
- 4The 7 consecutive integers below add up to 511, x - 2, x - 1, x, x + 1, x + 2, x + 3, and x + 4. What is the value of x?
- 5
Which of the following is a complete factorization of the expression 12b

^{2}c + 6bc + 3b?