anonymous
  • anonymous
how do I find the sin of a triangle
Mathematics
schrodinger
  • schrodinger
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ParthKohli
  • ParthKohli
I must correct it to '\(\sin\) of an angle'.
ParthKohli
  • ParthKohli
You find the opposite side of that angle, and then divide that by the hypotenuse in the given triangle.
ParthKohli
  • ParthKohli
And that, ma'am, is the way to find \(\sin\) given an angle.

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anonymous
  • anonymous
|dw:1343316228890:dw| just to make you feel easier ;)
anonymous
  • anonymous
|dw:1343316381359:dw|
ParthKohli
  • ParthKohli
What do you have to find the \(\sin\) of?
anonymous
  • anonymous
Sin of V
ParthKohli
  • ParthKohli
What is the side opposite to \(\angle V\)?
anonymous
  • anonymous
w
ParthKohli
  • ParthKohli
What is the length given?
anonymous
  • anonymous
72
ParthKohli
  • ParthKohli
Actually, 72 is not opposite to V. |dw:1343316700534:dw|
anonymous
  • anonymous
oh my bad.
ParthKohli
  • ParthKohli
Also, hypotenuse is the longest side. Note that the thing I told you applies only for right triangles.
anonymous
  • anonymous
okk ParthKohli
anonymous
  • anonymous
This is a useful mnemonic to remember fundamental trigonometric concepts. Classic: SOH CAH TAO Sin = Opposite side length / Hypotenuse side length Cosine = Adjacent side length / Hypotenuse side length Tangent = Opposite side length / Adjacent side length
ParthKohli
  • ParthKohli
Erm, it's SOH CAH TOA @dpflan
anonymous
  • anonymous
thanks
anonymous
  • anonymous
so would it be 21 over 75
ParthKohli
  • ParthKohli
Yeah!
anonymous
  • anonymous
okk thanks for your help
anonymous
  • anonymous
heh, right @ParthKohli, my mistake ;)
ParthKohli
  • ParthKohli
Oops! Sorry for tagging!
anonymous
  • anonymous
Edited: Classic: SOH CAH TOA Sin = Opposite side length / Hypotenuse side length Cosine = Adjacent side length / Hypotenuse side length Tangent = Opposite side length / Adjacent side length
anonymous
  • anonymous
so would cosX be 72/75
ParthKohli
  • ParthKohli
Um, no. \[\cos = {{\text{adjacent} \over \text{hypotenuse}} \Longrightarrow \cos X = ? } \]
ParthKohli
  • ParthKohli
Adjacent side is \(21\). Hypotenuse is the longest side i.e \(75\).
anonymous
  • anonymous
OK AND TAN X WOULD BE 21/72
ParthKohli
  • ParthKohli
Nope.
ParthKohli
  • ParthKohli
tan = opposite/adjacent
anonymous
  • anonymous
sin theta= perpendicular/hypatenus
anonymous
  • anonymous
@ali110 thanks
anonymous
  • anonymous
Some people have curly brown hair,they paint black some=sine people have=perpendicular(from people)/hypatenus(from have) so sine=perpendicular/hypatanus curly=cosine brown hair=base(from brown)/hypataneus(from hair) so cosine=base/hypatenus they=tan paint black=perpendicular(from paint)/base(from black) so tan=perpendicular/base whole trignometry in just in line!!!!!!!!!! hahahahaahaha @cerichards

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