Well, the cos(∅) is negative in the second and third quadrants. If you are solving for theta, you would use the inverse of the cos or arccos
take the inverse of both sides to get:
x = arccos(-2/3) now evaluate the right
x = 131.8103149 degrees
to find your second solution, subtract your reference angle from 360 degrees.
360 - 131.8103149 = 228.1896851 degrees
Now the period of cos is 2π or 360 degrees. So if you want to consider all possible solutions, you would need to add/subtract 360n to both solutions above..
Not sure if this is what you're looking for, but thought I would leave it here for you just in case... As a side note, you could do this problem in radian measurement as well.
The answer simplified is:
a= —2x^2+7x+22
Answer:
81
Step-by-step explanation:
the answer is 81, just out this in the solution
First, you add the discount.
Then you add the tax
Like come on, common sense, why would you pay taxes for money that you don't have to pay since you got a discount