Question
Mathematics Question on Trigonometric Functions
Let P(x)=cos2x+sin4x,for any x∈R.Then which of the following options is correct for all x?
A
61≤P(x)≤43
B
0≤P(x)≤21
C
0≤P(x)≤1
D
21≤P(x)≤23
E
43≤P(x)≤1
Answer
43≤P(x)≤1
Explanation
Solution
The correct option is (E): 43≤P(x)≤1