SOLUTION: Find the exact value of: sin(3pi/2) or sin 270 degrees cot (3pi/2) or cot 270 degrees (Can you show me the working as well, Thank you)

Algebra ->  Finance -> SOLUTION: Find the exact value of: sin(3pi/2) or sin 270 degrees cot (3pi/2) or cot 270 degrees (Can you show me the working as well, Thank you)      Log On


   

Question 1130108: Find the exact value of:
sin(3pi/2) or sin 270 degrees
cot (3pi/2) or cot 270 degrees
(Can you show me the working as well, Thank you)
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
sin%283pi%2F2%29=-1+ in radians-> Conversion from radians to degrees, it's equal to: sin(270+°) ->sin(270=-1+°) (III quadrant)
use Unit Circle and you will see that 270=3pi%2F2 and sine of both is -1
cot+%283pi%2F2%29=0 or cot%28270%29=0
use Unit Circle and you will see that 270=3pi%2F2 and cos of both is 0
since cot%28x%29=cos%28x%29%2Fsin%28x%29=>cot%28x%29=0%2F1=0