fundmaentla trig identities and right triangle Flashcards
1
Q
quotient identities
tan theta =
A
sin theta/ cos theta
2
Q
quotient identities
cot theta
A
cos theta/ sin theta
3
Q
pythagorean identities
sin^2theta + cos^2theta = ??
A
1
4
Q
pythagorean identities
1 + tan^2 theta =
A
sec^2 theta
5
Q
pythagorean identities
1 + cot^2theta = ??
A
csc^2theta
6
Q
45 45 90
hypotenuse
A
x square root 2
or
x^1/2
7
Q
45 45 90
the other two sides
A
x
8
Q
30 60 90
hypotenuse
A
2x
9
Q
30 60 90
bottom side
A
x square root 3
or
x^1/3
10
Q
30 60 90
left side
A
x
11
Q
equation for arc length(s)
A
s=r(theta)
12
Q
how to find area of a sector
A
A=1/2r^2(theta)
13
Q
circumference of circle
A
2(pi)r
