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what is the sin of 225 degrees in fraction form

 Oct 25, 2014

Best Answer 

 #1
avatar+23254 
+5

If you place this angle on a graph, it will be in the third quadrant, 45° below the x-axis.

The sides of a  45° - 45° - 90°  triangle are  1 - 1 - √(2)

Labeling the three sides: the hypotenuse is '1', the horizontal (x-value) is '-1', and the vertical (y-value) is also '-1'.

The value of sin is the y-value divided by the hypotenuse:  sin(225°)  =  - 1 / √(2).

Rationalizing the denominator,  sin(225°)  =  - √(2 / 2).

 Oct 25, 2014
 #1
avatar+23254 
+5
Best Answer

If you place this angle on a graph, it will be in the third quadrant, 45° below the x-axis.

The sides of a  45° - 45° - 90°  triangle are  1 - 1 - √(2)

Labeling the three sides: the hypotenuse is '1', the horizontal (x-value) is '-1', and the vertical (y-value) is also '-1'.

The value of sin is the y-value divided by the hypotenuse:  sin(225°)  =  - 1 / √(2).

Rationalizing the denominator,  sin(225°)  =  - √(2 / 2).

geno3141 Oct 25, 2014
 #2
avatar
0

is it 225360=58?

 Oct 26, 2014
 #3
avatar+118696 
+3

No anon, it is the sine of the angle that is wanted.  

 Oct 27, 2014
 #4
avatar+121 
0

oh, okay...

 Oct 27, 2014
 #5
avatar+121 
0

you know, that it was 58.

 Oct 27, 2014

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