Question

In a right triangle ABC, right angled at 'C' in which AB = 13 cm, BC = 5 cm, deter.
mine the value of cos2 B + sin? A.​

Answer 1

Answer:

Because with what you stated the hypotenuse, which is always opposite the right angle, would be side AC. But the hypotenuse is always the longest side, but 5 < 13. If so the right angle is at A instead of B. Now you can use the pythagorean theorem.

5^2 + x^2 = 13^2

25 + x^2 = 169 : Subtract 25 on both sides.

x^2 = 144 : Take the square root of both sides.

x = 12