Academics – Mathematics : 2012/OCT/06
Question
Q6. (a) Fig Q6(a) shows a triangular prism on a horizontal base.
CD is vertical, AB = 55mm, angle DBC = 20°, angle DAC = 15° and
angle ACB = 100°
Calculate the vertical height CD. (12)
(b) Given sin (ωt – 0.1) = 0.4
Calculate the least positive value of t if ω = 50π (4)
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