# M1

#1
Hello, mechanics 1 and the understanding of trigonometry is hard to understand, well for me it is...

In this image it states 0.5cos70 = 0.5a. I find it hard to understand how they've derived that, given sin =opp/hyp, cos = adj/hyp and tan = opp/adj. referring to the image - in trig we're taught the longest side is the hyp, and opposite the angle is opposite, and the last is obviously adjacent; understood. In order to find opposite in this diagram; surely we'd use tan=opp/adj, but this is wrong, please help me understand why?
0
#2
Oh shnap, because we're resolving downwards that's why we're trying to find the hyp!!! Damn i just figured out why. "Youu mr. Cool-light are ******ed" yes I know!
1
7 years ago
#3
(Original post by Cool-Light)
Oh shnap, because we're resolving downwards that's why we're trying to find the hyp!!! Damn i just figured out why. "Youu mr. Cool-light are ******ed" yes I know!

So I am off to bed then...
0
#4
(Original post by TeeEm)

So I am off to bed then...
Okay thanks anyways! Enjoy your time of peace
1
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