Date | May 2018 | Marks available | 4 | Reference code | 18M.1.AHL.TZ2.H_8 |
Level | Additional Higher Level | Paper | Paper 1 (without calculator) | Time zone | Time zone 2 |
Command term | Find | Question number | H_8 | Adapted from | N/A |
Question
Use the substitution to find .
[4]
a.
Hence find the value of , expressing your answer in the form arctan , where .
[3]
b.
Markscheme
* This question is from an exam for a previous syllabus, and may contain minor differences in marking or structure.
(accept or equivalent) A1
substitution, leading to an integrand in terms of M1
or equivalent A1
= 2 arctan A1
[4 marks]
a.
= arctan 3 − arctan 1 A1
tan(arctan 3 − arctan 1) = (M1)
tan(arctan 3 − arctan 1) =
arctan 3 − arctan 1 = arctan A1
[3 marks]
b.
Examiners report
[N/A]
a.
[N/A]
b.