An object moves in simple harmonic motion with period 2 minutes and amplitude 10m. At time t=0 minutes, it’s displacement d from rest is -10 m, and initially it moves in a negative direction.

Pythagorean theorem

in the right angle triangles there is a relationship that governs the length of the three sides. if we knows the length of any two sides, the third side may be calculated by the use of the Pythagorean theorem.

This theorem states that the square on the hypotenuse of a right angled triangle is equal to the sum of the squares on the remaining two sides.

we only use Pythagorean theorem to find the length of the missing side of a right angled triangle only.