click below
click below
Normal Size Small Size show me how
Trig Identities
Reciprocal, Quotient, and Pythagorean Identities
Question | Answer |
---|---|
sin u | 1 / csc u |
cos u | 1 / sec u |
tan u | 1 / cot u |
csc u | 1 / sin u |
sec u | 1 / cos u |
cot u | 1 / cot u |
(sin u)^2 + (cos u)^2 | 1 |
(tan u)^2 + 1 | (sec u)^2 |
1 + (cot u)^2 | (csc u)^2 |
sin(2u) | 2 sin u cos u |
cos(2u) | (os u)^2 - (sin u)^2 = 2(cos u)^2 - 1 = 1 - 2(sin u)^2 |