Pythagorean Theorem
Which side of your triangle has to be the "c" of the Pythagorean Theorem formula?
The hypotenuse
Which of these is NOT one of the special right triangles we learned about?
A. 30-60-90
B. 60-60-60
C. 45-45-90
B. 60-60-60
Sine = ? / ?
Opposite Leg / Hypotenuse
Tangent = ? / ?
Tangent = Opposite Leg / Adjacent Leg
What is the acronym we use to remember the 3 trig functions: sine, cosine and tangent
SOH CAH TOA
What is the formula for the Pythagorean Theorem?
a2 + b2 = c2
Look at Figure 3. What is the value of x?
x = 7
Cos(X) = 18 / 25
In the above equation, what operation would cancel out the cosine attached to the "X".
Cos-1 (Inverse of Cosine)
Which of the following equations would be used to solve for a side of a triangle?
A. Sin(x) = 14 / 21
B. Tan(42) = 25 / x
B. Tan(42) = 25/x
Look at Figure 7. What is the value of X?
x = 18
Look at Figure 1. What equation would you use to solve for x?
82 + x2 = 182 or x2 + 82 = 182
Look at Figure 4. What is the value of X?
x = 5
Look at Figure 8.
What equation would I use to solve for X?
Sin(32) = 6 / X
Look at Figure 9. What equation would I use to solve for x?
Cos(15) = x / 17
Given the following 3 lengths, what type of triangle would you have if those 3 sides formed a triangle:
3, 6, 9
A. Right
B. Acute
C. Obtuse
D. Not a Triangle
D. Not a Triangle
Given the following 3 lengths, what type of triangle would you have if those 3 sides formed a triangle:
7, 8, 14
A. Right
B. Acute
C. Obtuse
D. Not a Triangle
C. Obtuse
Look at Figure 5. What is the value of x?
x = 14
Look at Figure 12. What is the Sin A in simplest form?
3 / 5
Look at Figure 12. What is the Cos C in simplest form?
3 / 5
Given the following 3 lengths, what type of triangle would you have if those 3 sides formed a triangle:
10, 12, 15
A. Right
B. Acute
C. Obtuse
D. Not a Triangle
B. Acute
Look at figure 2. What does X equal? (Rounded to the nearest tenth)
7.3
Look at Figure 6. What is the value of x?
10 times the square root of 2
Look at figure 10.
What is the value of X?
66.4 Degrees
Look at Figure 11.
What is the value of X?
7.1
Look at Figure 12. What is the Sin B?
It doesn't exist. Trig functions are only used on the acute angles of a right triangle.