Trig Inverses.

Last week in class we learn about inverses dealing with trig functions.

You must hit mode first and make sure it is in either radians or degrees at the right moment,if it isn't then all of your answers will then be incorrect.

For all inverses you have to have at least two answers.

In order to move quadrants there is a series of steps you must follow:

If your in quadrant one and you want to get to the 2^nd one-make negative and add 180 degrees.

If your in quadrant one and you want to get to the 3^rd -add 180 degrees.

If you in quadrant one and you want to get to the 4^th -make negative and add 360 degrees.

Ex. Sin ^-1 ( .2 ) = 11.536

Since sin is postive in the first and second quadrant, you would make the decimal a negetive number and add 180 to it.

Your answer would then be -2076.48

You cannot leave the answer in this format,so you would then turn the decimal into minutes and seconds.

-.48*60=-28.8

-.8*60=48

Your new answer would be 2067 degrees, 28 minutes, 48 seconds.