Mathematics · May / June 2023 · Paper 21 · Question 19
0580
As printed in the paper
Show the answer and mark scheme
19(a)[2]
correct sketch Correct sketch to go through (0, 1), (360, 1) and (180, –1) [2]
B1 for correct cosine curve shape through (0, 1)
19(b)[3]
126.9 or 126.86 to 126.87 233.1 or 233.13 to 233.14 [3]
B2 for 1 correct angle 3 −
or M1 for cos x = oe 5 If M1 or 0 scored
SC1 for two angles with a sum of 360
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