Cos x is negative and sin x is negative.Which of the following is true of x?
0o < x < 90o
90o < x <180o
180o < x < 270o
270o < x <360o
-90o < x <90o
Correct answer is C
In the 3rd quadrant, only the tan of angles are positive.
The 3rd quadrant = 180° < x < 270°
If log10 q = 2.7078, what is q?
5102
849.9
510.2
84.99
51.02
Correct answer is C
q = 102.7078
Antilog of 2.7078 = 510.2
What value of k makes the given expression a perfect square ? m2 - 8m + k = 0
2
4
8
16
64
Correct answer is D
Take half the coefficient of m and square it
=> (-8/2)2 = k = 16
Find the root of the equation 2x2 - 3x - 2 = 0
x = -2 or 1/2
x = -2 or1
x = -2 or 2
x = -1 or 2
x = -1/2 or 2
Correct answer is E
2x2 - 3x - 2 = 0
2x2 - 4x + x - 2 = 0
2x(x - 2) + 1(x - 2) = 0
(2x + 1)(x - 2) = 0
x = −12 or x = 2
Evaluate log106 + log1045 - log1027 without using logarithm tables
0
1
1.1738
1.3802
10
Correct answer is B
log106 + log1045 - log1027
log10 6×4527
= log102 x 5
log1010 = 1