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Mathematics 11 Online
OpenStudy (omarbirjas):

Explain how to use the measures of a right triangle to calculate the exact value of sin 30°? How can this information be used to determine the exact value of sin 60°?

OpenStudy (anonymous):

@nopen

OpenStudy (anonymous):

@omarbirjas this is a very interesting question. This is like defining sin itself. before I explain anything. I have to be sure that you are familiar with the unit circle

OpenStudy (anonymous):

|dw:1431385831862:dw|

OpenStudy (anonymous):

okay in a unit we can consider it's radius as 1 if you take the sin of 30° in this circle you will notice that it's gonna be the y value divided by the radius of the 1 in other words it's pretty much like saying sin30° = y so whenever your putting in values of sin (of any angle) you're literally getting the value for y

OpenStudy (anonymous):

*by the radius 1

OpenStudy (anonymous):

https://www.mathsisfun.com/algebra/trig-interactive-unit-circle.html this is a interactive unit circle that you can play around with. do the same thing for sin 60°

OpenStudy (omarbirjas):

and what would y be?

OpenStudy (anonymous):

for??

OpenStudy (anonymous):

y value changes according to the given angle

OpenStudy (omarbirjas):

yea but what does why stand for....

OpenStudy (omarbirjas):

what does it represent

OpenStudy (anonymous):

|dw:1431386638289:dw|

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