TUC-6+Inverse+Trig+Functions

The goal of this section is to gain the ability to find the angle of a function when only the value is given. Here is a good example: sinx=1/2. The value, 1/2, is given, but the angle used to find the value is not. This is when you have to use an inverse trig function. The functions that must be known are arcsinx, arccosx, and arctanx. "x" being the angle that you must find. As you go further into this section, you may come across problems such as secx=2. This problem can be changed into one that you are more familiar with. Change the "sec" to "cos." In doing this, you must also flip the numerator and denominator of 2, which makes it 1/2. The problem has now become cosx=1/2. Which is much easier to memorize since 1/2 is on your chart of radians. The answer to this problem is //π// /4.

(PWL 4.8. pg 331)

Here are some links that can help you:

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Extra practice problems: