JAMB - Mathematics (2019 - No. 7)
Find the length of the chord |AB| in the diagram shown above.
4.2 cm
4.3 cm
3.2 cm
3.4 cm
คำอธิบาย
Length of chord = \(2r \sin (\frac{\theta}{2})\)
= \(2(3) \sin (\frac{68}{2})\)
= \(6 \sin 34\)
= \(6 \times 0.559\)
= 3.354 cm \(\approxeq\) 3.4 cm