|3.14-pai|+|5-pai|

|3.14-pai|+|5-pai| sin(5pai/6)+sin(pai/6) /pai-3.14/=快 /pai-3.14/=? 化简3.14-pai 3.14-pai的绝对值 三角函数 sin7/5pai*cos(-11/6pai)+tan(-15/4pai)*tan7/5pai sin7/5pai*cos(-11/6pai)+tan(-15/4pai)*tan7/5pai,计算得数, cos(pai/15)×cos(2pai/15)×cos(3pai/15)×cos(4pai/15)×cos(5pai/15)×cos(6pai/15)×cos(7pai/15)求值 cos(pai/15)×cos(2pai/15)×cos(3pai/15)×cos(4pai/15)×cos(5pai/15)×cos(6pai/15)×cos(7pai/15)求值 函数y=2sin(pai/6-2x)(x∈[0,pai]为增函数的区间是A、[0,pai/3] B、[pai/12,7pai/12] C、[pai/3,5pai/6]D、[5pai/6,pai] cos (a+4pai)cos ^2(a+pai)sin^2(a+3pai)/ sin(a-4pai)sin(5pai+a)cos^2(-a-pai) COS(PAI/5)COS(2PAI/5)=?XIE tan(5pai/24)/1-(tan平方5pai/24) 已知sin(pai/6+a)=3/5,pai/3 cos(pai/4+x)=3/5,17pai/12 cos(pai/4+x)=3/5,17pai/12 cos(a+pai/4)=3/5,pai/2