Question

How to solve this? ​

Answer 1

Answer:

$(\frac{1}{2} ) ^{2} + ( \frac{1}{2}) ^{2} - (1) ^{2} = \frac{ - 1}{2} \\ lhs = \frac{1}{4} + \frac{1}{4} - 1 \\ \frac{1 + 1 - 4}{4} \\ \frac{ - 2}{4} \\ \frac{ - 1}{2} = rhs$

$( \sqrt{3} ) ^{2} + \cosec(\pi - \frac{\pi}{6} ) +3 ( \frac{1} { \sqrt{3} } ) {}^{2} = 6 \\ lhs = 3 + 2 + 3( \frac{1}{3} ) \\ 3 + 2 + 1 \\ 6 = rhs$