Trig
1)From definition -->tan(tan^-1(v))=v 2)cos^2(a)=1/(tan^2(a)+1) cos(a)=+-1/sqrt(tan^2(a)+1) cos(tan^-1(v))=+-1/sqrt(v^2+1)
math
Let x- is the side of the barn. The area of the yard A(x)=x*(120-x)/2=60x-x^2/2 A'(x)=60-x=0 => x=60,(120-x)/2=30 max A=1800m^2
Math
30+x=3(6+x)
Algebra
1)y=(+ or -)sqrt(4-(x-2)^2) not a function 2)y=4-x^2-4x function 3)y=4-x function 4)y=4/x function
Algebra
2)... 4y+y...?
Algebra
sqrt(y^2)=absolute value of y ( IyI )
Math
z=(x-m)/б x=zб+m x=1*2+72=74
math
... and one unit to the left
Trig
1.With each point (x,y) we also have point (-x,y)-->the graph is symmetric y-axis 2.With each point (x,y) we have points (-x,y), (x,-y), (-x,-y) --> y-axis, x-axis, origin
algebra
L = T + 42 2L = 5T - 24
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