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Mathematics 15 Online
OpenStudy (anonymous):

Fill in the blanks. In the 30-60-90 triangle below, side s has a length of ___________ and the hypotenuse has a length of ____________.

OpenStudy (anonymous):

OpenStudy (whpalmer4):

|dw:1371623441820:dw| We know that the side s divided by hypotenuse h = sin 60 degrees.\[\sin 60^\circ = \frac{s}{h}\] We also know that the side s divided by the side of length 1 = tan 60 degrees.\[\tan 60^\circ = \frac{s}{1}\] From your knowledge of the unit circle, what are the values of \(\sin 60^\circ \) and \(\tan 60^\circ\)?

OpenStudy (whpalmer4):

|dw:1371623824099:dw|

OpenStudy (anonymous):

0.86602540378443864676372317075294 and 1.7320508075688772935274463415059?

OpenStudy (whpalmer4):

well, yeah. do you know the symbolic versions?

OpenStudy (anonymous):

no im not very good at math let alone geometry i need these answers of my class or i wont graduate high school so i need these answers quickly...

OpenStudy (whpalmer4):

well, have a look at the unit circle diagram here: http://www.embeddedmath.com/downloads/files/unitcircle/unitcircle-letter.pdf

OpenStudy (anonymous):

okay all of that looks like gibberish to me sorry...

OpenStudy (whpalmer4):

anyhow, hopefully it is clear that s = sqrt(3), then \[1^2+ s^2=h^2\]\[1^2+(\sqrt{3})^2 = h^2\]\[1+3=4\]\[h=2\] so the sides are in ratio \(1:\sqrt{3}:2\)

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