Questions - The Maths and Science Tutor
Figure 1 shows the curve C, with equation y = 6 cos x + 2.5 sin x for 0 ≤ x ≤ 2π (a) Express 6 cos x + 2.5 sin x in the form R cos(x − α), where R and α are constants with R π> 0 and 0 < α < ⁄ 2 Give your value of α to 3 decimal places. (3) (b) Find the coordinates of the points on the graph where the curve C crosses the ... ................
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