Higher November 2020 Paper 1 Q5
5 Use trigonometry to work out the size of angle \(x\). [2 marks]
Not drawn accurately
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| cos and \(\dfrac{9}{18}\) oe identified | M1 | |
| 60 | A1 | |
| Alternative method 2 | ||
| sin and \(\dfrac{\sqrt{18^2 - 9^2}}{18}\) identified or tan and \(\dfrac{\sqrt{18^2 - 9^2}}{9}\) identified | M1 | |
| 60 | A1 | |
Additional guidance
| Accept an embedded answer, eg \(\cos 60 = \dfrac{9}{18}\) with no further working | M1A1 |
| \(180 \div 3 = 60\) | M0A0 |