设tan2a=-2根号2,2a在180度与360度之间,求[2cos^2(a\2)-sina-1]/根号2(a+pi/4
设tan2a=-2根号2,2a在180度与360度之间,求[2cos^2(a\2)-sina-1]/根号2(a+pi/4
设tan2a=-2根号2,求cos^a/根号2-sina-1/2sin(a+/pai4)
设tan2a=2根号2,a属于(π/2,π),求(2cos^a/2-sina-1)/(sina+cosa)
tan2a=-2根号2,2a属于(90`,180`),求 [2cos^2(a/2)-sina-1]/根号2sin(a+4
tan2a=-2根号2,2a属于(90`,180`),求[cos^2(a/2)-sina-1]/根号2sin(a+45`
sina=3/5,a∈(0,π/2),求tan2a+根号2cos(a-π/4)
已知sinA+sinA=根号2/3(A在90度到180度之间),求(1)sinA-cosA.(2)sinA的三次-cos
sina=5/4,那么sin(a+4/pi)-二/根号2•cos(pi-a)=
已知a∈(π/2,π)sina=根号5/5,则tan2a等于多少
三角形ABC中sin(2Pi-A)=-根号2cos(3Pi/2+B)根号3cos(2Pi-A)=根号2sin(Pi/2+
化简根号下[1-cos(a-pi)]\2
sina+cosa=-3/根号5,且|Sina|>|cos a|,求tan(a/2)