Donte bought a computer that was 20% off the regular price of $1.080. If an 8% sales tax was added to the cost of the computer.
1 answer:
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Answer:
Please, refer to the images below
Step-by-step explanation:
We need to solve for x in the equation
cos (x+ pi) ^2 = sin (x)
cos (x+ pi) = - cos(x)
(-cos (x)) * (-cos (x)) = sin(x)
cos(x) ^2 = sin(x)
We know that
cos(x) ^2 + sin(x) ^2 = 1
cos(x) ^2 = 1 - sin(x) ^2
1 - sin(x) ^2 = sin(x)
sin(x) ^2 + sin (x) -1 = 0
Let A = sin(x)
A^2 + A - 1 = 0
(solutions attached in picture 1)
This means that
x = arcsin(A)
(solutions attached in picture 2)
Answer:
135°
Step-by-step explanation:
To convert <em>Radians </em>to <em>Degrees</em>, you multiply the <em>Radians </em>amount by .
Thus, we get *
We then get , which simplifies into 135 degrees.