Small Angles Approximations Flashcards
1
Q
What do you use when finding a small angle approximation for sin?
A
sin x ≈ x
2
Q
What do you use when finding a small angle approximation for cos?
A
cos x ≈ 1 - x^2/2
2
Q
What do you use when finding a small angle approximation for tan?
A
tan x ≈ x
3
Q
How would you find an approximation for Cos 0.2?
A
Cos 0.2 ≈ 1 - (0.2)^2/2
≈ 0.98
3
Q
How would you find an approximation for Cos x + 10sin15x = 0
A
≈ 1 - x^2/2 + 10(15x) = 0
