Parametric And Trigonometric Flashcards
1
Q
r = ?
A
(X^2 +Y^2)^1/2
2
Q
Theta = ?
A
arctan(y/x)
3
Q
cos2x = ?
A
cos^2x - sin^2x
4
Q
(1)^1/2 = ?
A
+/- 1
5
Q
Periodic repeats but is it continuous?
A
Yes, but it can be discontinuous!
6
Q
Is harmonic continuous?
A
Yes, only continuous
(sinx, cosx, sin3x…)
7
Q
Can you break tri functions (sin cos …) into periods of pi/2
A
Yes, this helps with integration and square roots; be sure to absolute value!
8
Q
Square root of x^2 = |x|
A
Input can be negative
Output must be positive
9
Q
Square root of x^2 = |x|
A
Input can be negative
Output must be positive
