Answer:
see explanation
Step-by-step explanation:
Using the trigonometric identities
• tan x = 
• sec x =
, csc x = 
Consider the left side with x = Θ

=
=
× 
= 
=
× 
= secxcscx = right side ⇒ verified
We know that for √x to be meaningful, we must have x ≥ 0.
If we square both sides of the inequality, we have
x < 4²
x < 16
Thus the whole solution is
0 ≤ x < 16
The following choices are valid solutions to the inequality:
B. 12
C. 2
E. 5
Answer: 1st one, porpostional
Step-by-step explanation: