How it works ?
In the applet below, use INVERSE TRIGONOMETRIC FUNCTIONS to write EXACT EXPRESSIONS for the measures of the acute angles (A and B) in the right triangle displayed.
Be sure to enter EXACT VALUES (and not decimal approximations).
For example, to input the expression arcsin(sqrt(13)/5), simply enter “arcsin(sqrt(13)/5)” — without the quotation marks.
arcsin(…. means ARCSINE OF….
arccos(…. means ARCCOSINE OF…
arctan(… means ARCTANGENT OF…
sqrt(… means SQUARE ROOT OF…
You should be able to write the measure of each angle in 3 DIFFERENT WAYS. To clear any entered expression at any time, simply click the “Reset Answer” button.
If you enter a correct expression for any angle, the applet will indicate this to you.