U3C3: Trigonometric Ratios Flashcards
1
Q
sine
A
opposite/hypotenuse
2
Q
cosine
A
adjacent/hypotenuse
3
Q
tangent
A
opposite/adjacent
4
Q
cosecant
A
hypotenuse/opposite
5
Q
secant
A
hypotenuse/adjacent
6
Q
cotangent
A
adjacent/opposite
7
Q
identity
A
an equation that always holds true, no matter what you substitute for the variable
x+x=2x
x+0=x
8
Q
first trigonometric identity
A
tan=sin/cos
the tangent of any angle is equal to the sine of that angle over the cosine of that angle
9
Q
second trigonometric identity
A
cot=cos/sin
the cotangent of any angle is equal to the cosine of that angle over the sine of that angle
10
Q
pythagorean identity
A
sin^2 + cos^2 = 1
