Answer:
Step-by-step explanation:
Given
Required
Find 
In trigonometry:
If sin(A) = cos(B), then
So, we have:
Collect Like Terms
Answer:
<em>x≥3</em>
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Step-by-step explanation:
Graphing y = 4 and the focus, we clearly see that the equation we need has the form (x - h)^2 = 4a(y - k).
We need to find a, h and k.
The focus is half way between the vertex and directrix.
You know that y = 4 is 2 units away from the focus and the focus is 2 units down from the focus. So, our vertex is (-3, 0).
From the vertex to the directrix, there are 4 units. Half that distance is the value of a. So, a = 2.
We have all that is needed to form our equation.
(x - (-3))^2 = 4(2)(y - 0)
(x + 3)^2 = 8y
Done.
Answer:
9a-13b
Step-by-step explanation:
6a-12b+3a-b
=6a+3a-12b-b
=9a-13b
