（cosπ/12－sinπ/12）（cosπ/12＋sinπ/12）
=cos²π/12-sin²π/12
=cosπ/6
=√3/2
三角函数的计算（cos12/π－sin12/π）（cos12/π＋sin12/π）的值等于多少.
4个回答
相关问题
-
（cos[π/12-sinπ12]）（cos[π/12+sinπ12]）= ___ ．
-
sinπ/12 - （√3）cos π/12等于多少
-
sinπ/12cos5π/12等于
-
数学三角函数,a=( 2sin(x+π/12),cos(x-π/12) ) b=( cos(x+π/12),2sin(x
-
cos*π/12—sin*π/12
-
sin(π/12)-cos(π/12)=
-
con²(5π/12)-sin²(7π/12)=cos²(5π/12)-sin²
-
急：求sin π/12×cos π/12的值
-
cosπ/12+(根号3)×sinπ/12的值
-
[2sin(π/12)sin(nπ/6)]/2sin(π/12)={cos[(2n-1)π/12]-cos[(2n+1)