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cos

yep

nop its base/hyp

but you dont have the base therefore you must use cosine

so it should be 2.28/4.07

well i think thats the way it should be done.. maybe you can ask someone else to confirm it.

well no cos function will be use..
adjacent = 2.28 , hyp =4.07

yes.

yes, so you cant do sine because it requires you use adjacent

lol no.. its cosine.

|dw:1352832846895:dw|

|dw:1352832995681:dw|
if we are working on this mark angle then your Hyp base and perp will be this.

|dw:1352833051199:dw|
if you are working on this angle then your hyp base and perp are this.

Not yet... 0.560 that is the cosine of Angle A.
Now you need to use "Inverse Cosine" to get angle A.

cosine = a/c

Yes, that's exactly right :) Nice work.