Instead of doing retarded graphs, we get to go back and do those equation things from 8-1. You know, where had to get the trig function by itself and stuff.
However, unlike everyone else, I won't be posting," THINGS YOU CAN'T DO EVER DO OMG." Instead, just make sure you know not to divide by a trig function when you're solving to cancel something out, and not to cancel from the inside the trig function.
Cue the example:
2sin^2Θ-1=0
Add the one, 2sin^2Θ = 1
Divide by two, sin^2Θ = 1/2
Find the square root, sinΘ = √1/2 (neg or pos)
The inverse would equal 45.
Now, unlike 8-1, you must find the degrees of all the quadrants, not just positive or negative.
So, using those rules from 8-1, do w/e you need to get sin to each quad.
Q1 = 45
Make it negative and then add 180, Q2 = 135
Just add 180, Q3 = 225
Make it negative and add 360, Q4 = 315
These are your final answers. Hope this helped you in some way. Good luck on the test this week guys, I'm sure you'll need it. (Especially you, David)
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