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Trigonometric Ratios
Presentation
•
Mathematics
•
9th Grade
•
Hard
Joseph Anderson
FREE Resource
8 Slides • 13 Questions
1
By Loreno Norcio
2
By the end of the lesson, you are expected to
identify parts of a Right Triangle
illustrate the six trigonometric ratios: sine, cosine, tangent, secant, cosecant, and cotangent
value the uses of trigonometric ratios
Six Trigonometric Ratios
3
4
Draw
Name the sides of the right triangle.
5
6
Fill in the Blanks
Observe the given figure. Look at angle X and complete the statement below.
"The OPPOSITE SIDE is found
Type answer...
7
Fill in the Blanks
Observe the given figure. Look at angle X and complete the statement below.
"The ADJACENT SIDE is found
Type answer...
8
Fill in the Blanks
Observe the given figure. Look at right angle and complete the statement below.
"The HYPOTENUSE SIDE is found opposite the
Type answer...
9
Loreno Norcio
10
Multiple Choice
The SINE (sin) of an angle θ is the ratio of the opposite side to the hypotenuse. Which is its mathematical representation?
sinθ=hypotenuseopposite
sinθ=oppositehypotenuse
11
Multiple Choice
The COSINE (cos) of an angle θ is the ratio of the adjacent side to the hypotenuse. Which is its mathematical representation?
cosθ=adjacenthypotenuse
cosθ=hypotenuseadjacent
12
Multiple Select
The TANGENT (tan) of an angle θ is the ratio of the sine to cosine. Which is its mathematical representation?
tanθ=cos θsin θ
tanθ=adjacentopposite
13
Activity 4:
The Other Three
Loreno Norcio
14
Multiple Choice
The COSECANT (csc) of an angle θ is the reciprocal of SINE. Which is its mathematical representation?
cscθ=oppositehypotenuse
cscθ=hypotenuseopposite
15
Multiple Choice
The SECANT (sec) of an angle θ is the reciprocal of COSINE. Which is its mathematical representation?
secθ=hypotenuseadjacent
secθ=adjacenthypotenuse
16
Multiple Choice
The COTANGENT (cot) of an angle θ is the reciprocal of TANGENT. Which is its mathematical representation?
cotθ=adjacentopposite
cotθ=oppositeadjacent
17
SOH-CAH-TOA
CscHO-SecHA-CotAO
18
Activity 5
Loreno Norcio
19
Draw
Identify the applications of trigonometric ratios based on the following pictures.
20
Draw
Identify the applications of trigonometric ratios based on the following pictures.
21
Draw
Identify the applications of trigonometric ratios based on the following pictures.
By Loreno Norcio
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