the concept i am going to is chapter 8 section 1
we are solving for theta. in order to find theta you must get the trig function by itself and find its inverse. an inverse has 2 answer with some exceptions find where the angle is based on trig function and if number is positive or negative.
step 1: take the inverse of the postive number to find quadrant angle to get to
step 2: make postive add 180
step 3: add 180
step 4: make the number from step 1 negative by adding 360
Example: 2cos(theta)=-1
step 1: carry the 2 over
(theta)= cos (-1)1/2
step 2: check your trig chart to see if 1/2 is on it. 1/2=pi/6=30 degrees.
step 3: graph and cos is postive in quad 2 and 3.
step 4: make it postive by add 180.
step 5: add 360 to make the answer negative
and answer should be 180.154; 359.845
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