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23 Cards in this Set
- Front
- Back
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difference of tan
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Tan(x-y) =
tan(x)-tan(y) / 1 + tan(x)tan(y) |
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sum of tan
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Tan(x+y)=
tan(x)+tan(y) / 1-tan(x)tan(y) |
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difference of cos
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Cos(x-y)=
cos(x)cos(y) + sin(x)sin(y) |
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sum of cos
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Cos(x+y)=
cos(x)cos(y) - sin(x)sin(y) |
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difference of sin
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Sin(x-y)=
sin(x)cos(y) - cos(x)sin(y) |
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sum of sin
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Sin(x+y)=
sin(x)cos(y) + cos(x)sin(y) |
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Pythagorean 1 of 3
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sin^2x + cos^2x = 1
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Phytagorean 2 of 3
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tan^2x + 1 = sec^2x
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Pythagorean 3 of 3
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cot^2x + 1 = csc^2x
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Half angle for tan 1 of 3
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tan x/2= (1-cosx) / sinx
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Half angle for tan 2 of 3
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tan x/2= sinx / (1 + cosx)
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Half angle for tan 3 of 3
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tan x/2 =
+ - sq.root (1-cosx)/(1+cosx) |
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Half angle for cos
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cos x/2=
+ - sq. root (1+ cosx) / 2 |
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Half angle for sin
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sin x/2=
+ - sq. root (1-cosx) / 2 |
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Double angle for tan
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Tan(2x) =
2tanx / (1-tan^2x) |
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Double angle for cos 1 of 3
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Cos(2x) = 1- 2sin^2x
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Double angle for cos 2 of 3
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Cos(2x) = 2cos^2x-1
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Double angle for cos 3 of 3
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Cos(2x) = cos^2x - sin^2x
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Double angle for sin
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Sin(2x) = 2sinxcosx
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Reciprocal for sin
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sin= 1/csc
csc=1/sin |
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Reciprocal for cos
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cos= 1/sec
sec= 1/cos |
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Reciprocal for tan
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tan= 1/cot
cot= 1/tan |
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Tan & Cot Reciprocal
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tan= sin/cos
cot= cos/sin |
