lets say 15 and 9, 15 is the hypotenuse, am I able to use a trig formula to find the third side and how would i determine which formula to use.
I can already do it using the balance method and Pythagoras theorem
I can already do it using the balance method and Pythagoras theorem
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Yes, so you can do it using A squared + B squared = C squared?
You can also do it Sine or Cosine, two trig functions, but you need and angle of one of the corners other than the 90 degree corner.
Sine is the length of the opposite side of the angle divided by the length of the hypotenuse. For example, Sine of say one of the angles is 30 degrees and is opposite the side length of 9:
Sin(30) = 9/15
You can also use Cosine, that is the length of the side adjacent of the angle divided by the hypotenuse. For example, say one of the angles is 30 degrees and is in the corner touching the side length of 9 and the hypotenuse:
Cos(30) = 9/15
Of course if you do not know what the unit circle is or how to use it then I suggest using a calculator that has these functions. Although I am confused as to why you want more answers to a question you already know how to solve.
You can also do it Sine or Cosine, two trig functions, but you need and angle of one of the corners other than the 90 degree corner.
Sine is the length of the opposite side of the angle divided by the length of the hypotenuse. For example, Sine of say one of the angles is 30 degrees and is opposite the side length of 9:
Sin(30) = 9/15
You can also use Cosine, that is the length of the side adjacent of the angle divided by the hypotenuse. For example, say one of the angles is 30 degrees and is in the corner touching the side length of 9 and the hypotenuse:
Cos(30) = 9/15
Of course if you do not know what the unit circle is or how to use it then I suggest using a calculator that has these functions. Although I am confused as to why you want more answers to a question you already know how to solve.
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Which side is 9?
Here is a trick: "soh cah toa"
soh stands for sine because the 'o' in soh stands for the opposite side. (The side that is opposing the angle) and h = hypotenuse.
cah stands for cosine because the 'a' stands for adjacent, which is the side that is between the angle and the right side angle. h=hyp.
toa stands for tangent and is opposite and adjacent.
Just right this down on your homework and look at it for reference. (:
Here is a trick: "soh cah toa"
soh stands for sine because the 'o' in soh stands for the opposite side. (The side that is opposing the angle) and h = hypotenuse.
cah stands for cosine because the 'a' stands for adjacent, which is the side that is between the angle and the right side angle. h=hyp.
toa stands for tangent and is opposite and adjacent.
Just right this down on your homework and look at it for reference. (:
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the Pythagoras theorem states that, a^2+b^2=c^2
therefore, if c is the hypotenuse, then,b which is your third side must equal.
a^2=c^2-b^2
thus, a^2=15^2-9^2
=225-81
=144
square root of 144 is 12, therefore other side "a" is 12 units.
therefore, if c is the hypotenuse, then,b which is your third side must equal.
a^2=c^2-b^2
thus, a^2=15^2-9^2
=225-81
=144
square root of 144 is 12, therefore other side "a" is 12 units.
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If i remember correctly you can use a^(2)+b^(2)=c^(2). Where a^(2)+9^(2)=15^(2) this is the same formula that to find the hypotenuse so it should be able to be used to figure out this answer also.
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Cos 53 degrees is approximately .6 which is 9/15.
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its a 3:4:5 triangle. the other side is 12. no need to complicate it.