Question

wwwen

請問這題怎麼算🙏

92
(B)
12. Elsino +cos A = 1 sin (90°- 0) = cos ou
☆ (sin 23º- sin 67°) +(sin 23° +sin 670) = (A)1 (B)2 (C)3 (0)4
RU

Answer 1

Yorick

答案為：2