cos15度+sin15度 等于多少

Question

如题所述

Answer 1

cos15+sin15=根号2（cos15sin45+sin15cos45）=根号2*sin(15+45)=根号2sin60=(根号6)/2
度全省了，自己加上去吧^_^

Answer 2

cos15°+sin15°
=(√6+√2)/4+(√6-√2)/4
=√6/2