MCQ
If $A=`[(1, \tan x),(-\tan x, 1)]^`$, then $A^{\top} A^{-1}=$ ______.
- ✓`[(cos2x, -sin2x),(sin2x, cos2x)]`
- B`[(cos2x, sin2x),(sin2x, cos2x)]`
- C`[(-cos2x, sin2x),(-sin2x, cos2x)]`
- D`[(tanx, 1),(-1, tanx)]`
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| Column I | Column II | ||
| i. | Proximal convoluted tubule | a. | Formation of concentrated urine |
| ii. | Distal convoluted tubule | b. | Filtration of blood |
| iii. | Henle's loop | c. | Reabsorption of 70-80% of electrolytes |
| iv. | Vasa recta | d. | Ionic balance |
| v. | Malpighian body | e. | Counter mechanism |