find angle a in the following trianglehttp://curriculum.kcdistancelearning.com/courses/ALG2x-HS-A09/a/assessments/Semester1Exam/A2_Image_SemesterAFinal_281.gif

Question

imstuck · Answer

Use the sin formula.  Sin(A) = opposite/hypotenuse.  Use our given values.  Sin (A) = 2/4 or 1/2.  Now use the inverse sin on your calculator.  Are you allowed?  Or you could find on a graph where the sin of an angle is 1/2.  Sin is opposite over hypotenuse, so in the fraction 1/2, the 1 represents the side length across from the angle, and the 2 is the hypotenuse.  Let's draw it out.  It's positive, so let's assume that it's in the first quadrant.  |dw:1401711225996:dw|