Trigonometry Reference Sheet
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1
2Trigonometry
Reciprocal Identities
Quotient Identities
1
1
1
sin
u
cos
u
tan
u
sin
u
cos
u
csc
u
sec
u
cot
u
tan
u
cot
u
1
1
1
cos
u
sin
u
csc
u
sec
u
cot
u
sin
u
cos
u
tan
u
Pythagorean Identities
2
2
2
2
2
2
sin
u
cos
u
1
1 tan
u
sec
u
1 cot
u
csc
u
2
2
2
2
2
2
sin
u
1 cos
u
tan
u
sec
u
1
cot
u
csc
u
1
2
2
2
2
2
2
cos
u
1 sin
u
1 sec
u
tan
u
1 csc
u
cot
u
Cofunction Identities
(
)
(
)
(
)
(
)
(
)
(
)
Odd-Even Identities
(
)
(
)
(
)
Sum and Difference Formulas
Double-Angle Formulas
sin(
u v
) sin cos
u
v
cos sin
u
v
sin(
u v
) sin cos
u
v
cos sin
u
v
sin 2
u
2sin cos
u
u
cos(
u v
) cos cos
u
v
sin sin
u
v
2
2
cos 2
u
cos
u
sin
u
cos(
u v
) cos cos
u
v
sin sin
u
v
2
2 cos
u
1
2
1 2sin
u
tan
u
tan
v
tan(
u v
)
1 tan tan
u
v
2 tan
u
tan
u
tan
v
tan 2
u
tan(
u v
)
2
1 tan
u
1 tan tan
u
v
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