IB Math HL Trigonometry Test 3 2014 P2 Q7

IB Math HL Trigonometry Test 3 2014 P2 Q7

IB Year 6 | Grade 12
6 marks

Two touching discs have radii \(8\text{ cm}\) and \(5\text{ cm}\). A taut string is wrapped around them as shown.

Calculate the length of string needed.[6]

Solution:

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Answer:\(67.5\text{ cm}\) (3 s.f.).

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