Solving For Theta

To solve for theta (@) the steps are different than an algebra equation.
1.Isolate the trig function
2.Take inverse of the trig function.
such as sin-1 cos-1
arc sin arc cos
3.Use trig char or calculator to find value. Only use the value after three decimal places if got more.
4.Use the four quadrants to find the right angle + # or -# with trig function. There are always atleast two answers for each inverse. You get one and find the other.
*To move in quadrants: Q1 to Q2 = make -# and add 180
Q1 to Q3 = add 180
Q1 to Q4 = make -# add 360

EX1 cos -1 (square root 2/2)
1.From trig chart cos = 45
2. Since its positive fin other positive answer. Move to quadrant 4
-45+360=315
3. Your two answers are (45,315)