# TI-83/84 Calculator trouble for sin, cos, and tan? What am I doing wrong? :(?

Ok so I'm doing physics hw and the book is explaining how to do it in a sample problem and shows this
A 305N force is exerted on a sled at an angle of 35*. How much of this force is pulling along the ground and how much is lifting the sled?
(So I need to find sides a and b, since I already have c right?) So I...
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Ok so I'm doing physics hw and the book is explaining how to do it in a sample problem and shows this

A 305N force is exerted on a sled at an angle of 35*. How much of this force is pulling along the ground and how much is lifting the sled?

(So I need to find sides a and b, since I already have c right?) So I follow these steps given to me to find a.

c = 305 N

θ = 35*

cos θ = a/c

a = c cos θ

a = (305 N) (cos 35*)

a = 250

So side a equals 250 according to the book, but when I put the exact problem into my calculator

a = (305 N) (cos 35*) I get the answer of -275.6261226

My steps:

First I put cos(35) into the calculator and it says -0.9036922051 then I multiply that to 305.

Obviously its not so obvious how do I put this equation into my calculator and get the correct answer? Or am I supposed to do it another way? Plz help if you can? I'm running out of time to finish this I'm exhausted!

A 305N force is exerted on a sled at an angle of 35*. How much of this force is pulling along the ground and how much is lifting the sled?

(So I need to find sides a and b, since I already have c right?) So I follow these steps given to me to find a.

c = 305 N

θ = 35*

cos θ = a/c

a = c cos θ

a = (305 N) (cos 35*)

a = 250

So side a equals 250 according to the book, but when I put the exact problem into my calculator

a = (305 N) (cos 35*) I get the answer of -275.6261226

My steps:

First I put cos(35) into the calculator and it says -0.9036922051 then I multiply that to 305.

Obviously its not so obvious how do I put this equation into my calculator and get the correct answer? Or am I supposed to do it another way? Plz help if you can? I'm running out of time to finish this I'm exhausted!

Update:
Oh wow that's it! Thanks you guys so much! :)

Would have been great if the teacher mentioned that... :/ But thank you! I got it right just now

Would have been great if the teacher mentioned that... :/ But thank you! I got it right just now

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