Lesson 540 minutes
Finding Angles from Ratios
Mathematics • Trigonometry I
📚 Curriculum Context
This lesson implements: NCDC S3 Mathematics - Topic 1: Trigonometry I
View Full Curriculum GuidanceOverview
Learners understand and use inverse trigonometric functions (sin⁻¹, cos⁻¹, tan⁻¹) to find angles from given trigonometric ratios, applying these to solve for unknown angles in right-angled triangles.
Lesson Details
- Subject:
- Mathematics
- Grade:
- S3
- Term:
- Term 1
- Topic:
- Trigonometry I
- Lesson:
- 5 of 15
- Duration:
- 40 minutes
Curriculum Reference
NCDC Lower Secondary Mathematics Syllabus (2019), S3 Topic 1 (Trigonometry I)
Keywords
inverse trigsin inversecos inversetan inversefind anglesarcsinarccosarctan
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