Easy yes or no answer sine law question.

[ryan8642]

Homework Statement

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Is it ok to use sine law for this :

A=sIN^-1(40SIN120/65.8)

im not sure if this applies to the sin law angle restriction where the angle can't be over ??degrees?

 

[Mark44]

sin(120 deg.) = sin(60 deg.). The sin^-1 (or arcsin) function on a calculator will give you a value between -90 degrees and +90 degrees, so for some triangles with angles larger than 90 deg., you need to take this into account.