A-level Math 1 Year 66 Article 7 Trigonometry

A-level math, 1 year 66, item 7, this trigonometry is not difficult. Who practices the problem if you find it again, can do it again, of course, who is right? 🙋‍♀️🙋‍♂️# alevel math # Math 1 # alevel # dek69 # Xiu children