SOLUTION: exact value of sin 255
Algebra.Com
Question 755553: exact value of sin 255
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
exact value of sin 255
sin (255)=sin(135+120)=sin135 cos120+cos135 sin120
sin135º=√2/2*-1/2-√2/2*√3/2 =-√2/4-√6/4=-(√2+√6)/4
..
calculator check:
sin255º≈-0.9659..
exact value=-(√2+√6)/4≈-0.9659
RELATED QUESTIONS
find the exact value of the expression
cos 255... (answered by lwsshak3)
Using the sum or difference formulas, find the exact value of sin(255°). Express your... (answered by Edwin McCravy)
The exact value of sin 255 degrees is
a) (-sqrt 3-1)/(2sqrt2)
b) (sqrt 3+1)/(2sqrt2)... (answered by Fombitz)
Find the exact value of sin... (answered by stanbon)
exact value of... (answered by Alan3354,drk)
find the exact value of sin 195 (answered by lwsshak3)
Find exact value of:... (answered by stanbon)
Find the exact value of sin... (answered by Alan3354)
find the exact value of sin 75... (answered by fractalier)