Finding angles

When we need to find an unknown angle in a right- angle triangle, we must use the inverse of that particular function.











Step 1: find the names of the two sides you know

Step 2: now use the first letters of those sides,  (Opposite and Hypotenuse) and phrase (SOHCAHTOA)

Step 3: O and H are present in SOH, which tells us we need to use sine into the equation, then we must use the inverse, this can be found by pressing "shift" then sin on the calculator.

            sinθ= 5/13
             θ= sin^-1(5/13)
               = 23°