- Messages
- 151
- Reaction score
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- 38
ABC is a right angled triangle. Angle subtended by diameter is always 90 degree. So angle ABC is 90. angle c will be half of (pi/3) that is (pi/6). so you just use sin and cos with the hypotenuse AC equal to 16. So no need to use cosine rule and stuff. It is just o level maths knowledge.You can't use sin since it's not a right angle triangle.
For finding side AB, you know that angle BOA is 60, and two of your sides are 8. It has to be an equilateral triangle meaning AB is also 8.
For finding BC you just use cos rule using triangle OBC. If you want I can solve it :c
Also, I've got finally got question :3 A star daredevil asd
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_13.pdf
Q3.