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Mth 173
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cos2a =
cos2a =
cos
2
a - sin
2
a
2cos
2
a - 1
1 - 2sin
2
a
Power-Reducing Formulas
sin²u =
sin²u = (1 - cos2u) / 2
Power-Reducing Formulas
cos²u =
cos²u = (1 + cos2u) / 2
Power-Reducing Formulas
tan²u
tan²u = (1 - cos2u) / (1 + cos2u)
Pythagorean Identities
sin²x + cos²x =
sin²x + cos²x = 1
Pythagorean Identities
1 + tan²x =
1 + tan²x = sec²x
Pythagorean Identities
1 + cot²x =
1 + cot²x = csc²x
Author
markh1
ID
131732
Card Set
Mth 173
Description
Double Angle Formulas
Updated
2012-01-30T22:20:35Z
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