Mysterious Angle X: Solving What's Smaller Than 1rad

[JecaSpirro]

Homework Statement

I was given an angle "X" with sinX=X and cosX=1. The question says that it is smaller than 1rad. Other data is irrelevant.

Homework Equations

None.

The Attempt at a Solution

In my point of view, this angle would be 0, because the only angle I know that sinOfAngle=valueOfAngle and cos=1 and at the same time smaller than 1rad. But the answer isn't 0, it's 0,03. Would someone try to explain this?

 

[Math Jeans]

No, it should be 0. I don't know where 0.03 came from.

 

[berkeman]

I agree that it should be x=0. You can show the answer is wrong by plugging 0.03 radians into a calculator for sin(x) and cos(x).

 

[Pizza_Pi]

Homework Statement

I was given an angle "X" with sinX=X and cosX=1. The question says that it is smaller than 1rad. Other data is irrelevant.

Homework Equations

None.

The Attempt at a Solution

In my point of view, this angle would be 0, because the only angle I know that sinOfAngle=valueOfAngle and cos=1 and at the same time smaller than 1rad. But the answer isn't 0, it's 0,03. Would someone try to explain this?

sin 0 is equal to x, which is 0. cos 0 is also equal to 1.
sinx = x, cosx = 1
sin (0) = (0), cos(0) = 1

 

[JecaSpirro]

Good news for me. Thank you all, people. Sorry to bother with a such small thing. And for my english. 8D