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JayDelV
 one year ago
Sine, Cosine, and Tangent of 45 degrees?
JayDelV
 one year ago
Sine, Cosine, and Tangent of 45 degrees?

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UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2dw:1439360650195:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2dw:1439360684499:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2we need to set the lengths of the sides of the triangle for simplicity we can set the adjacent side to be 1

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2what will the other sides of the triangle be if the adjacent side is 1?

JayDelV
 one year ago
Best ResponseYou've already chosen the best response.0Wait what do you mean?

JayDelV
 one year ago
Best ResponseYou've already chosen the best response.0This is actually a timed test and I'm super tired

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2dw:1439361178381:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2(notice it is an isosceles triangle )

JayDelV
 one year ago
Best ResponseYou've already chosen the best response.0I forgot how to do this and I don't have a calculator with me. Is there another way?

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2this way doesn't need a calculator

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2[isosceles triangle have a pair of sides of equal length]

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2[the sides of equal length, will be opposite to the angles of equal measure]

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2dw:1439361833342:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2now \[\tan\theta = \frac{\text{opp}}{\text{adj}}\]

JayDelV
 one year ago
Best ResponseYou've already chosen the best response.0so confused but 1/ over something, I'm not sure what the hypotenuse is

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2we don't need the hypotenuse for tan (we will need it for sine and cosine)

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2Great! which simplifies to 1 So we have tan 45° = 1

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2now we need to work out the length of that hypotenuse. we have a right angled triangle, so we can use Pythagorus a^2 + b^2 = c^2 where a and b are the adj and opp, and c is the hypo

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2so hypo = √( adj^2 + opp^2 )

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2plug in adj = 1, opp = 1

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.0that's one of the standard triangles. dw:1439362733572:dw

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2why remember, when you can work it out

UsukiDoll
 one year ago
Best ResponseYou've already chosen the best response.0\[\tan 45 = 1 , \sin 45 = \frac{1}{\sqrt{2}}, \cos 45 = \frac{1}{\sqrt{2}} \]

UnkleRhaukus
 one year ago
Best ResponseYou've already chosen the best response.2why bother to learn pythag. and triangle geometry ?
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