(a) the number of terms n
(b) the 5th term T(5)
(c) the sum of the series S(n)
6. In △ABC, BC = 10cm, ∠ABC =35∘and ∠BAC =80∘
(a) Find x.
(b) find the area of △ABC.
(Give your answer correct to 2 decimal places.)
7. (a) Solve sinθ = 1 for 0∘< θ∘< 360∘.
(b) Solve 3tanθ - √3 =0 for 0∘< θ∘< 360∘.
更新1:
有無人識做呀.....好急(幫幫我)
更新2:
有無人識做第5條呀.....幫幫忙呀 和第6條(a) 是Find ACcm.
