Krishna
0

Step 1: Consider a right angle triangle

NOTE:  Right angle triangle ABC with right angle is at B

Step 2: Write the Pythagoras theorem to the triangle.

NOTE:   AC^2 = AB^2 + BC^2

Step 3: Dividing each term by hypotenuse.(AC) and simplify

EXAMPLE:   \frac{AC^2}{AC^2} = \frac{AB^2}{AC^2} + \frac{BC^2}{AC^2}

(\frac{AC}{AC})^2 = (\frac{AB}{AC})^2 + (\frac{BC}{AC})^2