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17 Cards in this Set
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sin^2(x) + cos^2(x) =

1


tan^2(x) + 1 =

sec^2(x)


1 + cot^2(x) =

csc^2(x)


sin(x) =

sin(x)


cos(x)=

cos(x)


sin (x + y) =

sin(x)cos(y) + cos(x)sin(y)


cos (x + y) =

cos(x)cos(y)  sin(x)sin(y)


sin(xy) =

sin(x)cos(y)  cos(x) sin(y)


cos(xy) =

cos(x)cos(y) +sin(x)sin(y)


tan(x+y) =

tan(x) + tan(y)/
1  tan(x)tan(y) 

tan(xy) =

tan(x)  tan(y) /
1 + tan(x)tan(y) 

sin(2x) =

2 sin(x)cos(x)


A. cos(2x) =

cos^2(x)  sin^2(x)


C. cos(2x) =

2cos^2(x)  1


B. cos(2x) =

1  2sin^2(x)


cos^2(x) =

1 + cos(2x)/
2 

sin^2(x)

1  cos(2x)/
2 