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Mathematics 9 Online
OpenStudy (anonymous):

can someone help me with this question quickk? pleasee!

OpenStudy (anonymous):

Find the value of x. Round the length to the nearest tenth. The diagram is not drawn to scale.

OpenStudy (mathstudent55):

|dw:1366753078997:dw|

OpenStudy (mathstudent55):

|dw:1366753157737:dw|

OpenStudy (anonymous):

okay so how did u get the interior angles?

OpenStudy (mathstudent55):

For the 10 degree angle, the leg measuring 500 m is the opposite leg. The leg measuring x is the hypotenuse. Which trig function uses the opposite and hypotenuse.

OpenStudy (mathstudent55):

|dw:1366753252426:dw|

OpenStudy (anonymous):

cosine.

OpenStudy (anonymous):

i mean sin

OpenStudy (mathstudent55):

The dashed line above is parallel to the bottom leg of the triangle and forms a 90-deg angle with the leg measuring 500 m. That means the upper angle is 80, since 80 + 10 = 90

OpenStudy (mathstudent55):

SOH CAH TOA (S)ine = (O)pp/(H)yp (C)osine = (A)dj/(H)yp (T)angent = (O)pp/(A)dj

OpenStudy (anonymous):

okay im following now,, so which one would be oppostite?

OpenStudy (mathstudent55):

The sine function relates the opposite leg and the hypotenuse.

OpenStudy (mathstudent55):

Adjacent means next to. Opposite means far away. |dw:1366753494119:dw|

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