Mth 173

cos2a =

cos2a =

cos²a - sin²a

2cos²a - 1

1 - 2sin²a
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