Trigonometrical Formulas Flashcards
1
Q
1 + tan^2ß
A
1 + tan^2ß = sec^2ß
2
Q
1 + cot^2ß
A
1 + cot^2ß = csc^2ß
3
Q
sin x * sin y =
A
sin x * sin y = 1/2(cos(x - y) - cos(x + y))
4
Q
cos x * cos y =
A
cos x * cos y = 1/2(cos(x - y) + cos(x + y))
5
Q
sin x * cos y =
A
sin x * cos y = 1/2(sin(x - y) + sin(x + y))
