Formulas
Sine law
Cosine Law
Multiple choice
Solve
100
What is the sine formula?
sinθ = opposite/hypoteneuse
100
What 3 things do you need to use the sine law?
SSA (side,side,angle)
AAS (angle,angle,side)
100
Which angle would you solve for first?
Any angle
100
What does the guy that looks like a muffin say first on the cosine worksheet?
a) Remember to take the inverse to get the degree of the angle.
b) Hi, I'm Gregory! Today we are going to learn about the cosine law.
c) Remember to take the square root to get the length of the side.
d) Solve means to find all sides and all angles!
c) Remember to take the square root to get the length of the side.
100
Solve for length b
b = 19.38445594
200
What is the cosine formula?
Cosθ = adjacent/hypotenuse
200
What would you solve for first?
Side a
200
Which type of triangle(s) can you solve using cosine law?
Acute
200
Which law would you use to solve first?
a) Cosine law
b) SOH CAH TOA
c) Sine law
d) Rule of 180
Sine Law
200
Solve for side x
x = 7.999647869
300
What is the tangent formula?
Tanθ = opposite/adjacent
300
How many ratios do you need to solve a triangle with the sine law?
2
300
What can you find using the cosine law?
An angle or a side of a triangle
300
What is the last step to do in any question?
a) Check if it makes sense logically
b) Write a therefore statement
c) Check your answer
d) Draw a smiley face :)
a) Check if it makes sense logically
300
Solve the triangle 
x = 64.14
z = 7.54
∠ A = 75.86
400
What is the sine law?
400
Which type of triangle(s) can you solve using sine law?
Acute
400
Is this correct?
Obviously not theres nothing there how could it be correct???
400
Which is the incorrect equation?
2bc 1 __________ = _____ OR a2 = b2 + c2 - 2bc(cosA)
b2 + c2 - a2 cosA
Neither (Of course)
400
Solve for x
x = 116.8
500
What is the cosine law?
500
True or false: the ratios of opposite sides and angles are equal to the ratio of all other sides
True
500
If you have 2 sides what else do you need to solve the triangle?
A third side
500
Which is the correct equation?
a2 b2 c2 sinA sinB sinC
____ = ____ = ____ OR ____ - ____ = ____
sinA sinB sinC a2 b2 c2
Neither (obviously)
500
solve for θ
θ = 65.O1