The value of x will be x < π / 2. Then the correct option is B.
The connection between the lengths and angles of a triangular shape is the subject of trigonometry.
The trigonometric inequality is given below.
sec(2x) < –1
We know that 1/cos 2x = sec 2x
1/cos 2x < –1
1 < –cos 2x
cos 2x < –1
cos 2x < cos π
2x < π
x < π / 2
Then the correct option is B.
More about the trigonometry link is given below.
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