问题
解答题
化简:2
|
答案
原式=2
cos2
(x 2
sin2 2
+x 2
cos2 2
)x 2
=2sin
cosx 2
+2cos2x 2
-1+1x 2
=sinx+cosx+1=
sin(x+2
)+1.π 4
化简:2
|
原式=2
cos2
(x 2
sin2 2
+x 2
cos2 2
)x 2
=2sin
cosx 2
+2cos2x 2
-1+1x 2
=sinx+cosx+1=
sin(x+2
)+1.π 4