Find the compound interest on ₹62500 at 21% per annum for 1\( \frac{1}{2} \) years.
₹19,687.5
₹20,695
₹21,638.5
₹20,687.5
D. ₹20,687.5
If tan α = \(\sqrt{2}\) - 1, then the value of tan α - cot α = ?
\(\sqrt{2}\)+ 1
1
-2
2\(\sqrt{2}\)
C. -2