Find the value of cos A if angle A is acute and sin A = 7/10
(A)3/10
(B)1/9
(C)7/√51
(D)51/10
(E)√51/10
The Correct Answer
Explanation
A right circular cylinder is shown below, with dimensions
given in inches. What is the total surface area of the cylinder, in
square inches?(Note: The total surface area of a cylinder is given by 2πr2 + 2πrh, where r is the radius and h is the height.)
（A）3π （B） 5π （C） 6π （D） 8π （E） 11π
Correct Answer: D
Which of the following numbers is an imaginary number?
(A) 
(B) 
(C) -
(D) -
(E) -
Correct Answer: D
In the standard coordinate plane, what is the y-coordinate of the point of intersection of the two lines y = 4x – 6 and y = 2x + 2?
(A)4 (B)6 (C)10 (D)18 (E)30
Correct Answer: C
More ACT Math Exam Questions
- 1Which of the following expressions represents the product xy, if x = 4a3 and y = -3a5 + b?
- 2A rope 55 feet long is cut into two pieces. If one piece is 23 feet longer than the other, what is the length, in feet, of the shorter piece?
- 3The ratio of boys to girls in a math class is 4 to 5. If there are 18 students in the class, how many are boys
- 4For what value of a is the equation 3(a + 5) - a = 23 true?
- 5In the standard (x, y) coordinate plane, what is the slope of the line with equation 4y - 6x = 8?