SOLUTION: exact value of sin(7pi/6)

Algebra ->  Trigonometry-basics -> SOLUTION: exact value of sin(7pi/6)      Log On


   

Question 257084: exact value of sin(7pi/6)
Found 2 solutions by Alan3354, drk:
Answer by Alan3354(69443) About Me  (Show Source):
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
sin(7pi/6) is the same thing as sin(pi/6) but in Quadrant III.
sin(pi/6) = 1/2
Sin is negative in quadrant III, so,
sin(7pi/6) = -1/2