ASIN

Use to give the inverse sine of an angle.

The arcsin is the inverse function of the sine function. So given a sine value this function will give you the angle between -90 and 90 degrees. The arcsin is mainly used to determine the measure of an angle when two sides of a right angled triangle are known.

Here to find the angle C we can work it out if we know the two sides a and c. Dividing c by a will give us the sine of C

sin C = c/a

So to get the angle in the program the formula would be

=ASIN(c/a)

So using some sample values of a = 30 and c = 15 the formula would be

=ASIN(15/30)

This would return a value 30 degrees for the angle C