I insert in my calculator cos 50x60 = 42.42

[luigihs]

1) cos 60o = vx0 / 50 => vx0 = 50.cos 60o = ?
2) sin 60o = vy0 / 50 => vy0 = 50.sin 60o = ? OK so I use my calculator for 1) and I insert in my calculator cos 50x60 = 42.42 but this is not the right answer because the answer is 25 m/s because the answers are in the back of my book.

FOr question number 2) I not 100 % sure but I do the same thing sin 50x60 = 42.42 in this case I get the same answer than in cos, and the answer is 43 m/s so I don't know about this because I got 42.42 so maybe this is right.

 

[gneill]

What does your calculator give you for cos(60°) ?

 

[luigihs]

what does your calculator give you for cos(60°) ?

0.5877 ... but then I restart my calculator and I get 0.5

 

[gneill]

0.5877 ... but then I restart my calculator and I get 0.5

Your calculator was set to treat angles in 'grads' rather than degrees. There are 400 grads in a circle of 360 degrees.

 

[luigihs]

Your calculator was set to treat angles in 'grads' rather than degrees. There are 400 grads in a circle of 360 degrees.

But now that I restarted I get in cos 38.567 but I don't get 25 m/s ... and in sin I get now 45.96 and I suppose to get 43 m/s :(

 

[gneill]

But now that I restarted I get in cos 38.567 but I don't get 25 m/s ... and in sin I get now 45.96 and I suppose to get 43 m/s :(

More finger problems

You've taken the cosine of 50 degrees and multiplied by 60 rather than take the cosine of 60 degrees and multiply by 50.

 

[luigihs]

More finger problems

You've taken the cosine of 50 degrees and multiplied by 60 rather than take the cosine of 60 degrees and multiply by 50.

YEAHHH! Thanks! :)