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Mathematics 21 Online
OpenStudy (anonymous):

Find x.

OpenStudy (anonymous):

OpenStudy (anonymous):

@skullpatrol

OpenStudy (skullpatrol):

Any ideas?

OpenStudy (anonymous):

ya 9\[\sqrt{3}\]

OpenStudy (anonymous):

A. 9 B. 18 C. 9 times the square root of 3 D. 3 times the square root of 3

OpenStudy (skullpatrol):

$$sin(angle) = \frac{opposite}{hypotenuse}$$

OpenStudy (anonymous):

90= 9/x?

OpenStudy (skullpatrol):

The angle is 30 degrees.

OpenStudy (anonymous):

30=9/x

OpenStudy (skullpatrol):

sin(30)=9/x

OpenStudy (anonymous):

i got -.9= 9/x????

OpenStudy (skullpatrol):

Where did you get -.9 from?

OpenStudy (anonymous):

sin(30)

OpenStudy (skullpatrol):

Use your calculator please.

OpenStudy (anonymous):

I did

OpenStudy (anonymous):

-.988

OpenStudy (skullpatrol):

Is it set on deg

OpenStudy (skullpatrol):

or "rad"

OpenStudy (anonymous):

.5

OpenStudy (skullpatrol):

That is it :) sin(30) = 0.5

OpenStudy (anonymous):

.5= 9/x

OpenStudy (skullpatrol):

Yes, now solve for x.

OpenStudy (anonymous):

x=4.5

OpenStudy (skullpatrol):

does 9/(4.5) =?=0.5

OpenStudy (anonymous):

no

OpenStudy (skullpatrol):

Then $$x \neq 4.5$$ does it?

OpenStudy (anonymous):

idk

OpenStudy (skullpatrol):

|dw:1373585421660:dw|

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