Mathematics · Oct / Nov 2023 · Paper 21 · Question 19
0580
As printed in the paper
Show the answer and mark scheme
19(a)[2]
Correct sketch to go through (0, 1), close to (360, 1) and reasonably close to (180, –1) [2]
B1 for correct cosine curve shape through (0,1)
19(b)[2]
282.1 or 282.12… [2]
B1 implied by 77.9 or 77.87 to 77.88 or 282.13
or M1 for 360 – their acute angle
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