1
Q
Law of Sine
A
a/(sinA) = b/(sinB) = c/(sinC)
2
Q
Laws of Cosine
A
Given/Solving for angle A: a² = b² + c² - 2bc(cosA) Given/Solving for angle B: b² = a² + c² - 2ac(cosB) Given/Solving for angle C: c² = b² + a² - 2ba(cosC)
3
Q
Area formulas (4 of them)
A
Given only angle A:
Area = (1/2)(b)(c)(sinA)
Given only angle B:
Area = (1/2)(c)(a)(sinB)
Given only angle C:
Area = (1/2)(b)(a)(sinC)
Given only sides:
A = √(s)(s - a)(s - b)(s - c)
s = (a + b + c)/2
4
Q
Unit vector formula
A
u = v/||v||
5
Q
z1 * z2 = ?
A
(|z1|)(|z2|)[cos(θ1 + θ2) + isin(θ1 + θ2)]
6
Q
z1/z2 = ?
A
(|z1|/|z2|)[cos(θ1 - θ2) + isin(θ1 - θ2)]
7
Q
(z1)^n
A
[(|z|)^n][cos(nθ1) + isin(nθ1)]
8
Q
How many triangles could there be if you are given SAA?
A
1
9
Q
How many triangles could there be if you are given ASA?
A
1
10
Q
How many triangles could there be if you are given SSA/ASS?
A
0, 1, 2
