Kaitlyn's Blog #5

In this blog, I am going to explain 8-5.

This section is pretty much the same as 8-1 except you might have to use identities to get your trig function on the side by itself. You also have to see if the trig function has the same inverse or not.


THINGS YOU CAN'T DO!!!
1)you cant divide by a trig function when solving to cancel
2)you also cant cancel from inside the trig function


Example:

2 sin (squared) (theta) + 1 = 0
2 sin (squared) (theta) = -1
sin (squared) (theta) = -1/2
sin (theta) = +/- (square root) -1/2



(theta) = sin-1 ((square root) 1/2)
(theta) = 45


Q1: 45
Q2: 135
Q3: 225
Q4: 315

And that's how you do 8-5..