Question
Question: The number of real roots of (2 sec q –1) (4 sec q –1) = 0...
The number of real roots of (2 sec q –1) (4 sec q –1) = 0
A
0
B
1
C
2
D
Infinitely many
Answer
0
Explanation
Solution
(2 sec q –1) (4 sec q –1) = 0
Ž (2sec q –1) = 0 or (4 sec q – 1) = 0
Ž sec q = 1/2 or sec q = ¼
Which is not possible as sec q £ – 1 or ³ 1 So no solution.