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EnglandMathsQuick questions
Pure mathematics: advanced
Quick questions on Radian measure, arc length, sector area and small-angle approximations - OCR A-Level Maths A
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are segments?Show answer
A segment is the region between a chord and its arc. Find it by subtracting the triangle (formed by the two radii and the chord) from the sector.
What are small-angle approximations?Show answer
When is small and measured in radians, the functions are close to simple polynomials. These approximations let you simplify limits and model situations where angles are tiny.
What is q1?Show answer
Convert radians to degrees. [1 mark]
What is q2?Show answer
A sector has radius cm and angle radians. Find its area. [2 marks]
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