This trigonometry ratio is used when you know the hypotenuse and adjacent sides of a right triangle.
What is cosine?
State the equation that connects the sides of this triangle.

a2+d2=b2
Which ratio would you use to solve for the unknown?

Cos
Which ratio would help find the unknown angle?

sin
Solve for x.
#2
What is 5?
This trigonometry ratio is used when you know the opposite and hypotenuse sides of a right triangle.
What is sine?
Find the missing length in this triangle:
5cm
State the equation that would solve for the unknown below (you do not have to solve).

sin 72 = 10/x
State the equation that would solve for the unknown (you do not have to solve).

sin
Solve for x.
#28
What is 12.0?
This trigonometry ratio is used when you know the opposite and adjacent sides of a right triangle.
What is tangent?
Find the value of the unknown:

10.3 cm
Find the value of the unknown:

1.14
Find the unknown angle, to the nearest degree:

33
Solve for x.
#10
What is 10.7?
This equation is used when you know two sides and are looking for a third side in a right triangle.
What is Pythagorean Theorem?
Find the length of the missing side:

7.94m
Solve for the unknown side:

37
Find the value of the angle, to the nearest degree:

24
Solve for x.
#25
What is 29.2?
These equations are used when you know 1 side and 1 angle and you are looking for another side in a right triangle.
What are trigonometry ratios?
Is this triangle right-angled? Justify your answer.

No.
62+82 = 112
112 = 121
Solve for the unknown:

4.3
Find the value of the unknown angle:

32
Solve for x.
#16
What is 23.3?