(iv) cos2x sin2x sin2x cos2x
+ sin2x cos2x cos2x sin2x
cos2x | sin2x |
sin2x | cos2x |
sin2x | cos2x |
cos2x | sin2x |
Solution

cos2x | sin2x |
sin2x | cos2x |
sin2x | cos2x |
cos2x | sin2x |