Law Of Sines Flashcards
1
Q
Law of sins
A
Sin (A)/ a
Sin angle/ side
2
Q
How to find h
A
H= adj (sin angle)
3
Q
SSA
obtuse
Opp>other
A
One triangle
4
Q
SSA solving for h
A
H=opp one right triangle
H>opp no triangle
H less then opp and other
Two triangles
5
Q
Area of triangle
A
Area= 1/2(sin angle)( other sides)
6
Q
When to use law of cosines
A
SSS
SAS
7
Q
Law of cosines
A
Law of cosines
a^2= b^2+c^2-2(b)(c)(cos A)
8
Q
When solving SSS
A
Find the angle opposite of longest side with law of cos
9
Q
How to find semiperimeter
A
s= a+b+c/2
10
Q
Area of triangle when only have SSS
A
A=| s(s-a)(s-b)(s-c)
s=a+b+c/2
11
Q
SSA
Obtuse
Opp less than other
A
No triangle
11
Q
SSA
Acute
Opp>other
A
One triangle
12
Q
SSA
Acute
Opp less than other
A
Solve for h
13
Q
Reciprocal identity
Sin Ø
A
1/csc Ø
14
Q
Reciprocal identity
Cos Ø
A
1/sec Ø
