Trig Ratios B1 Ch9 Flashcards
1
Q
Cosine rule to find missing side
A
a2= b2+c2-2bcCos(A)
2
Q
Cosine rule for missing angle
A
Cos(A)= b2+c2-a2/2bc
3
Q
Sine rule to find missing side
A
a/SinA= b/SinB
4
Q
Sine rule for missing angle
A
SinA/a= SinB/b
5
Q
Which angle in a triangle is the smallest?
A
The one opposite the shortest side
6
Q
How do you find the ambiguous case of the sine rule
A
SinX= Sin(180-X)
7
Q
Equation for area of a triangle
A
1/2abSinC or 1/2bh
8
Q
How often does the sine graph repeat itself?
A
Every 360° or 2pi
9
Q
How often does the cos graph repeat itself?
A
Every 360°/2pi
10
Q
How often does the tan graph repeat itself
A
Every 180° or 1pi
11
Q
When are the vertical asymptotes on the tan graph?
A
x=-90°, 90°, 270°….
