Calculating Speed of Simple Pendulum at 25° Angle

[ashvuck101]

Homework Statement

A simple pendulum, 2.0 m in length, is released from rest when the support string is
at an angle of 25° from the vertical. What is the speed of the suspended mass at the
bottom of the swing?

Homework Equations

R²= X² + Y²

The Attempt at a Solution

I know the answer is 1.9ms^-1

but i keep getting 1.8126ms^-1

which is 2.cos(25)
what am i doing wrong?

 

[Stonebridge]

If you are going to use conservation of energy, for example, then you equate the k.e. at the lowest point to the p.e. at the highest.
The mass has risen a vertical height 2 - 2.cos25. when moved to its starting point.