True: The trigonometric ratios sine and secant are reciprocals of each other

has critical points where the derivative is 0:

The second derivative is

and
, which indicates a local minimum at
with a value of
.
At the endpoints of [-2, 2], we have
and
, so that
has an absolute minimum of
and an absolute maximum of
on [-2, 2].
So we have



Answer:
1
Step-by-step explanation:
A. 7x(2x+5) that is the answer
Answer:
Point (4,7) completely satisfies the equation and is a solution to the equation.
Step-by-step explanation:
Given:
Equation: 
To check if the point (4,7) is a solution to the given equation.
Solution:
The solution of an equation is given as
which completely satisfies the equation.
To check if the point (4,7) is a solution to the given equation, we will plugin
and
in the given equation and see if it satisfies it or not.
Plugging in point (4,7) in the equation:

Simplifying.


The above equation is always true, and hence point (4,7) completely satisfies the equation and is a solution to the equation.