The vertex form:

The axis of symetry is x = h.

We have

Substitute:

<h3>Answer: x = -3</h3>
Vertex is (-2,-3) and it's a minimum.
Answer:
3
Step-by-step explanation:




3
Answer:
see explanation
Step-by-step explanation:
Given
tan a =
= 
We require the hypotenuse h
Using Pythagoras' identity
h² = 9² + 40² = 81 + 1600 = 1681 ( take square root of both sides )
h =
= 41 , thus
sin a =
= 
cos a =
= 