Finals Flashcards
Pythagorean triples
3,4,5
5,12,13
7,24,25
sin^2 x + cos^2 x
1
tan^2 x + 1
sec^2 x
1 + cot^2 x
csc^2 x
sin 2 x
2 sin x cos x
cos 2 x
cos^2 x - sin^2 x
1 - 2 sin^2 x
2 cos^2 x - 1
tan 2 x
(2 tan x) / (1 - tan x)
sin 1/2 x
+- √(1/2 (1 - cos x))
cos 1/2 x
+- √(1/2 (1 + cox x))
cos (A + B)
cos A cos B - sin A sin B
sin (A + B)
sin A cos B + cos A sin B
law of cosine
c^2 = a^2 + b^2 - 2ab cos C
law of sine
(sin C / c) = (sin B / b) = (sin A / a)
check for second angle by 180 - [whatever angle answer you got]
area equation
1/2 bc sin A
loga(xy)
loga(x) + loga(y)
loga(x/y)
loga(x) - loga(y)
loga(x^n)
n loga(x)
loga(x)
y
a^y = x
loga(b)
(log b / log a) = (ln b / ln a)
loga(1)
0
loga(a)
1
a^(loga(x))
x
loga(a^x)
x
y = e^x is also
y = loge(x) = ln x
ln 1 =
0
ln e =
1
e^(ln x)
x