1. The problem statement, all variables and given/known data Anyone mind checking my answer for me? The area of a right triangle with hypotenuse H is A=1/4H^2sin(2x) x is one of the acute angles. Use differentials to estimate the relative errors of the area if H = 4cm exactly and x is measured to be 30degrees with an error of measurement of 15 minutes of arc. 2. Relevant equations A=1/4H^2sin(2x) dA=1/2H^2cos(2x)dx dA/A=2cot(60)(0.25) 3. The attempt at a solution A=1/4*16sin(60)=3.464cm^2 dA=8cos(60)(0.25) =0.125cm^2 dA/A=0.125/3.464=0.2887=relative error Now, did I have to convert to radians in step one? 30 to pi/6? Or is this right?