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Trigonometric Function

Further Mathematics SS 2 Week WEEK .......... Preview
Lesson Details (Preview)

Week Range: ................... - ...................

Date: ...................

Time: ...................

Duration: 40 minutes minutes

Theme: Trigonometry

Sub-topic: Trigonometric Ratios and Angles of Elevation/Depression

Learning Objectives (Preview)

By the end of the lesson, students should be able to:

  1. Define trigonometric ratios (sine, cosine, tangent) in terms of right-angled triangle sides
  2. Calculate the values of trigonometric ratios for standard angles ($30^\circ, 45^\circ, 60^\circ$)
  3. +2 more objectives in full version
Rationale (Preview)
This lesson bridges the gap between abstract geometric ratios and real-world measurement, a core component of the WAEC and NECO Further Mathematics sy [Preview only]
Presentation Steps (Preview)
Step / Time Teacher's Activities Student's Activities Learning Points
Step 1: 5 minutes - Introduction and Hook
Display a picture of a tall building or a hill. Ask: 'How can we measure the height of this building [Preview only]
Observe the image and brainstorm methods for measuring height. Write down the objectives in their no [Preview only]
Trigonometry allows indirect measurement of heights and distances.
Step 2: 10 minutes - Definition and Ratios
Draw a right-angled triangle on the board. Label sides: Opposite ($O$), Adjacent ($A$), Hypotenuse ( [Preview only]
Copy the definitions and the SOH CAH TOA mnemonic. Identify $O$, $A$, and $H$ in the drawn triangle.
Trigonometric ratios are relationships between the sides of a right-angled triangle and its acute an [Preview only]
+3 more steps in full version
Student Note (Preview)
2,178 characters total — showing first 400
## Trigonometric Ratios and Angles of Elevation/Depression **What is Trigonometry?** Trigonometry is the branch of mathematics that deals with the relationships between the sides and angles of triangles, especially right-angled triangles. **Key Points** 1. **SOH CAH TOA**: - $\sin \theta = \frac{\text{Opposite}}{\text{Hypotenuse}}$ - $\cos \theta = \frac{\text{Adjacent}}{\text{Hypotenuse}}$ - $\ta [Preview only]

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