Question

Pls answer the 2 and 3

Answer 1

2. {5sin^2(30°) + cos^2(45°) - 4tan^2(30°)} / { 2sin30° • cos30° + tan45°}

= { (5/4) + (1/2) - (4/3)} / {(√3 / 2) + 1}

= (5/12) / {(2+√3)/2}

=0.223297



question 3 is not clear.