Fundamental Trig Identities
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23 Terms
1
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sinx
\frac{1}{\csc x}
2
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cosx
\frac{1}{\sec x}
3
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tanx
\frac{1}{\cot x}
4
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cscx
\frac{1}{\sin x}
5
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secx
\frac{1}{\cos x}
6
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cotx
\frac{1}{\tan x}
7
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tanx
\frac{\left(\sin x\right)}{\left(\cos x\right)}
8
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cotx
\frac{\left(\cos x\right)}{\left(\sin x\right)}
9
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sin2x+cos2x
1
10
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1+tan2x
sec2x
11
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1+cot2x
csc2x
12
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\sin\left(\frac{\pi}{2}-x\right) - cofunction
\cos x
13
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\tan\left(\frac{\pi}{2}-x\right)
\cot x
14
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\sec\left(\frac{\pi}{2}-x\right)
\csc x
15
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\cos\left(\frac{\pi}{2}-x\right)
\sin x
16
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\cot\left(\frac{\pi}{2}-x\right)
\tan x
17
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\csc\left(\frac{\pi}{2}-x\right)
\sec x
18
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\sin\left(-x\right)
-\sin x
19
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\cos\left(-x\right)
\cos x
20
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\tan\left(-x\right)
-\tan x
21
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\csc\left(-x\right)
-\csc x
22
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\sec\left(-x\right)
\sec x
23
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\cot\left(-x\right)
-\cot x
Note 
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