H. PreCal - Trigonometric Functions | The Free Version
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Last updated 6:48 PM on 2/23/23
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25 Terms
1
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sinθ\=
1/cscθ
2
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cosθ\=
1/secθ
3
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tanθ\=
1/cotθ
4
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(quotient) tanθ\=
sinθ/cosθ
5
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(quotient) cosθ
sinθ/tanθ
6
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(quotient) cotθ
cosθ/sinθ
7
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(quotient) sinθ
cosθ/cotθ
8
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sin²θ+cos²θ\=
1
9
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1+tan²θ\=
sec²θ
10
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1+cot²θ\=
csc²θ
11
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sin (u+v)\=
sinucosv + sinvcosu
12
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sin (u-v)\=
sinucosv - sinvcosu
13
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cos (u+v)\=
cosucosv - sinusinv
14
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cos (u-v)\=
cosucosv + sinusinv
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tan (u+v)\=
(tanu + tanv)/(1-tanutanv)
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tan (u-v)\=
(tanu-tanv)/(1+tanutanv)
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sin2u\=
2sinucosu
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tan2u\=
(2tanu)/(1-tan²u)
19
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(first) cos2u\=
cos²u-sin²u
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(second) cos2u\=
2cos²u-1
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(third) cos2u\=
1-2sin²u
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sin(θ/2)\=
∓ √ ((1-cosθ)/2)
23
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cos(θ/2)\=
∓ √ ((1+cosθ)/2)
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(first) tan(θ/2)\=
(1-cosθ)/sinθ
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(second) tan(θ/2)
sinθ/(1+cosθ)