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Mathematics 13 Online
OpenStudy (anonymous):

Find the sine, cosine & tangent of acute angle A of triangle.

OpenStudy (anonymous):

|dw:1431812447856:dw|

OpenStudy (anonymous):

I think I got sin A = a/c or 7/25 = .28

Nnesha (nnesha):

given: 2 sides apply Pythagorean theorem to find 3rd side

Nnesha (nnesha):

nope sin = opposite over hyp not adjacent

Nnesha (nnesha):

\[\rm sin \rm \theta = \frac{ opposite }{ hypotenuse }~~~~ \cos \theta = \frac{ adjacent }{ hypotenuse } ~~\tan \theta = \frac{ opposite }{ adjacent }\]

OpenStudy (anonymous):

forgot to write the BC is 7 on the picture

Nnesha (nnesha):

ohh alright |dw:1431812616422:dw| so sin A = ?

OpenStudy (anonymous):

yes that pic is right now

OpenStudy (anonymous):

since you know the 90 degree angle wouldn't SIN A= 7/25?

Nnesha (nnesha):

okay sin A= opposite over hyp |dw:1431812695421:dw|

Nnesha (nnesha):

yes right sin A = 7 over 25

OpenStudy (anonymous):

great so I got SIN A - 7/25 and then take the sin-1 .28 = 16 degrees?

Nnesha (nnesha):

is there a box in original diagram ?

Nnesha (nnesha):

|dw:1431812909014:dw| this one

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