Posted by kelly on .
find the 5 other thrig functions if cos(theta) = square root of 2/2 and cotangent is less than 0

trig 
Henry,
Given:CosA=SQRT2/2
Since the cosine is positive and the
tangent and cotangent are negative
(less than 0), we are in the 4th Quad
rant. CosA=sqrt2/2=x/r, x=sqrt2, r=2,
Y=sqrt(r^2x^2)=sqrt(42)=+/sqrt2,
Y=sqrt2(4th Quadrant).
SinA=y/r=sqrt2/2.
CosA=sqrt2/2=x/r(Given)
TanA=y/x=sqrt2/sqrt2=1
cscA=(2/sqrt2).
secA=2/sqrt2
CotanA=sqrt2/sqrt2=1