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)