Finding acceleration of a block on the way down an incline

[Maylandra]

Homework Statement

Find acceleration of block on the way down incline.
The incline is 40 degrees and made of steel. The block is also made of steel.
μ_s = 0.6
μ_k = 0.3
mass of block = 2.00 kg

Homework Equations

a = g (sinθ - μcosθ)
a = F/m

The Attempt at a Solution

My friend is getting 4.04 somehow. When I plug the numbers in, using the coefficient of kinetic friction, I get 9.26.

 

[PhanthomJay]

First set your calculator to degrees instead of radians. Where are your equations coming from? Which is correctt and why?

 

[Maylandra]

First set your calculator to degrees instead of radians. Where are your equations coming from? Which is correctt and why?

lol well that's embarassing. Thanks, I would've been working on that for hours. I got it now