Advance calculator trigonometric functions.

My new phone is a Motorola Droid 2 (Android version 2.2). The Advance Calculator's trigonometric functions is not calculating right. Let us say we do the following calculations:

Cos(60)= -0.952412, correct answer should be 0.5
Sin(30)= -0.988031, correct answer should be 0.5
Tan(45)= 1.0, correct answer should be 1.0.

Maybe I am entering the numbers and operator keys out of sequence but something is wrong with the answers. Can you help me with this? Thank you.

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