3.12 equal representation of trig functions
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Last updated 2:07 PM on 4/2/26
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17 Terms
1
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sinx=
1/cscx
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cscx=
1/sinx
3
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cosx=
1/secx
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secx=
1/cosx
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tanx=
1/cotx
6
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tanx=
sinx/cosx
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cotx=
1/tanx
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cotx=
cosx/sinx
9
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Pythagorean identities
cos²x+sin²x=1
sin²x=1-cos²x
cos²x=1-sin²x
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cosecant formula
csc²x=1+cot²x
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cotangent formula
cot²x=csc²x-1
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secant formula
sec²x=tan²x+1
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tangent formula
tan²x=sec²x-1
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sin(a+b)=
sin(a-b)=
sina cosb + sinb cosa
sina cosb - sinb cosa
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cos(a+b)
cos(a-b)
cosa cosb - sina sinb
cosa cosb + sina sinb
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sin(2a)=
2sina cosa
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cos(2a)=
cos²a-sin²a
1-2sin²a
2cos²a-1
