设α为锐角,若cos(α+π/3)=4/5,则sin(2α+π/6)=?
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)
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
设α为锐角,且sinα=3cosα,则sinα×cosα的值等于?
设a为锐角,若cos(a+π/6)=3/5,则sin(a-π/12)=
设α为锐角,则cos(α+π÷6)=3÷5,则sin(α-π÷12)=
设α是锐角,cos(α+π/6)=-1/3,则cosα=____,sin(α+5π/12)=____
已知α为锐角 tanα=2 求3sinα+cosα/4cosα-5sinα