SOLUTION: 18. write the expression as the sin,cos,tan sin140cos50+cos140sin50

Algebra ->  Trigonometry-basics -> SOLUTION: 18. write the expression as the sin,cos,tan sin140cos50+cos140sin50      Log On


   

Question 174441: 18. write the expression as the sin,cos,tan
sin140cos50+cos140sin50
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
You have to recognize that this is the formula for the DIFFERENCE of sines.
sin(140-50) = sin 90 = 1

R^2