Introduction to Trigonometry
This lesson covers the basic concepts of trigonometry, including the measurement of angles and the definition of trigonometric functions. It explains the types of angles, the use of protractors for measuring angles, and the concept of quadrants in relation to angles. The lesson also introduces plane
- 00:48 “We also look at, by extension, what we call the Pythagoras theorem and what we call the Sokatoa. So what's this trig? Basically, the word trig came from the Greek word and the Greek word means measurements of triangles o...”
- 26:04 “And when we do that, we apply the same concept in solving it using the concept of radian and degree relations. So we have the following exercises we can solve. Convert the following radian measure to degrees and convert...”
- 10:58 “To-- let me call it y degree. So we call this 1. We call this 2. So how do we do this? Quickly, we say that 20 degrees to-- we recall that pi radian equal to 180 degrees. Pi radian equal to 180 degrees. So therefore, if...”
Trigonometric Ratios
This lesson covers the identification of sine, cosine, and tangent of an acute angle. It explains how to apply these trigonometric ratios to solve problems involving distances and lengths in right-angled triangles. The relationship between the sides and angles of triangles is also discussed.
- 00:00 “Hello, my name is Oyase, Sunday I'll be taking you mathematics for JSS3 and we have an interesting topic for today, which is trigonometry, an aspect of our measurement and geometry. And the question is what to be the foc...”
- 14:14 “that is given, then your hypotenuse. So, I could read, you could know, the particular one to apply. They are designed to cause all the time. Thank you very much. We've come to the end of the class. My name is Oyase Sunda...”
- 00:49 “ratio to finding distance and length? And three apply trigonometry ratio in solving what problems? Boops straight up. Now trigonometry ratio is applied on a triangle. You see that a triangle has three sides. So the right...”
Plane Figures and Their Properties
This lesson covers the identification and properties of various plane figures such as squares, rectangles, triangles, and circles. It explains how to calculate the area and perimeter of these shapes. The lesson also includes the classification of triangles their sides.
- 11:42 “So we just impute, substitute our values into the equation. Therefore, 80 is into bracket 2. It is equal to 2 bracket length plus breadth, which is 18. To solve that, we divide both sides by 2 to eliminate 2 on the other...”
- 10:55 “Therefore, the perimeter of the field is 180 meters. Moving on to the second question. A rectangle has a perimeter of 80 meters. Find the length of the rectangle if its breadth is 18 meters. From the question you see, we...”
- 12:31 “The circumference of a circle, which is 2 pi r, so we have 2 times 3.3 raised to 3, 1 of a 7 times 3 and a half, equals 2 times 22 of a 7 equals 7 of a 2, which is 2 times 11. And we have 22 meters. So the circumference...”
Rational and Non-Rational Numbers
This lesson covers the identification of rational and non-rational numbers. It explains the characteristics of different number sets, including natural numbers, whole numbers, and integers. The lesson also discusses the significance of the number PI in relation to circles.
- 12:38 “That's commonly used. That O to have, but it's not that it has a specific value. But for the purpose of computation, for the purpose of computation, we'll decide to represent pie to be 22 over seven. Because when you die...”
- 15:03 “So I put it. So simply, move it. I have my pie is what my circumference is given. The circumference is given in 62.832 over what's my radios? My radios is 10. That is 10. Now, I have 2 radios makes 1 diameter. That's tim...”
- 15:51 “When you divide it by 20, when you bring out your calculator and you divide this by 20, you are expected to have your pie to be 1. 3.1416, 3.1416, 3.1416. Now, that becomes my value when you divide it on your calculator....”
Similar Shapes
This lesson covers the identification of similar shapes such as triangles, rectangles, squares, cubes, and cuboids. It explains the criteria for similarity, including proportional sides and equal angles. The lesson also includes methods for enlarging figures using scale factors and calculating lengt
- 14:22 “other side by this other side, so you could have a complete factor, factored out, so let's add the complete, so we have the other side, the torched side, that's from Africa 3, those add the torched sides, and what the to...”
- 04:43 “Now look at the two triangles carefully. What do you observe? You observe one is bigger, one is smaller. Looking at the base, the base of the first is 12. The base of the second is 36. It means that the base of the secon...”
- 25:22 “these 2, if it cannot be in this form then your answer is wrong, now the last part is applying it to water problem, how do we apply it to water problem, how using your scalar factor to solve a problem, olatical wants to...”