How to Calculate M in a Simple Math Equation

[qwerty11]

Please break down how this solution was reached for me.

-3.2=-M(5)e^-((0.025)(.8))[377cos(377*0.08)-(0.025)sin(377*0.8)]
M=1.73

Thank you soo much!

 

[rock.freak667]

Calculate e^-((0.025)(.8))[377cos(377*0.08)-(0.025)sin(377*0.8)] first.

then just divide by that answer and then divide by 5.