Question

please solve this urgently!!!!!!

Answer 1

Given LHS:

$4(sin^4 30 + cos^4 60) - 3(cos^2 45 - sin^2 90)$

$4( (\frac{1}{2})^4 + ( \frac{1}{2})^4) - 3( (\frac{1}{ \sqrt{2} })^2 - 1)$

$4( \frac{1}{8} ) - 3( \frac{1}{2} - 1)$

$\frac{4}{8} + \frac{3}{2}$

$\frac{4 + 3 * 4}{8}$

$\frac{16}{8}$

2.


LHS = RHS.


Hope this helps!