Unit 30 · Introduction to Trigonometry
15 randomly selected questions from a bank of 60 · one attempt · 15 minutes on the clock.
Topics covered
- Angle measurement in the sexagesimal system (degrees, minutes, seconds) and conversion to/from decimal form
- Radian measure, the relationship between radians and degrees, and the arc-length formula l=rθ
- The area of a sector of a circle, coterminal (general) angles, and angles in standard position
- Quadrants, quadrantal angles, and the signs of trigonometric ratios in each quadrant
- Trigonometric ratios and their reciprocals, defined using a unit circle, with standard values for 30°, 45°, 60°, and quadrantal angles
- The three fundamental trigonometric identities and their proofs and applications
- Angles of elevation and depression, and solving real-life problems involving them
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