设α为锐角,若cos(α+π/6)=4/5,求sin(2α+π/12),
设α为锐角,若cos(α+π/6)=4/5,求sin(2α+π/12),
(江苏2012)设α为锐角,若cos(α+π/6)=4/5,则sin(2α+π/12)=
设α为锐角,若cos(α+π/6)=4/5,则sin(2α+π/12)=?
设α为锐角,tanα=3 求(cosα-sinα)/cosα+sinα)
a为锐角 cos(a+π/6)=4/5 求sin(2a+π/12)
三角函数:设a为锐角,若cos(a+π/6)=4/5,则sin(2a+π/12)的值为多少?
设a为锐角,若cos(a+π/6)=4/5,则sin(2a+π/12)的值为多少?
设a为锐角,若cos(a+π/6)=4/5,则sin(2a+π/12)值为
已知α为锐角 tanα=2 求3sinα+cosα/4cosα-5sinα
α,β为锐角 sinα=4/5,sinβ=12/13,求cos(α-β)/2
已知cos(α+π/6)=-根号2/4,且α为锐角,求sinα的值
设a为锐角,若cos(a+π/6)=4/5,则sin(2a+π/12)的值为?