Find the approximate values of theta between 0 degrees and 360 degrees that make the following equation a true statement:
cos thetha = -0.36467
a) Round final answer to the nearest minute
b) Round final answer to the nearest 10 minute
Find the approximate values of theta between 0 degrees and 360 degrees that make the following equation a true statement:
cos thetha = -0.36467
a) Round final answer to the nearest minute
b) Round final answer to the nearest 10 minute
Okay,
Let's see where cos is negative.
That would be the second and third quadrants.
Now let's calculate a reference angle.
Why did I drop the negative? Because we just determined where it will be negative. All we want now is a reference angle, which we will call .
Now substitute into the second and third quadrants.
Quadrant 2:
Quadrant 3:
I'm sure you can handle the rounding