a) M = $\frac{1}{\sqrt{2}}.\frac{1}{\sqrt{2}} + \frac{1}{2}$ = 1
b) N = sin60o.sin60o + $\frac{1}{2}$sin 45o.sin45o
= $\frac{\sqrt{3}}{2}.\frac{\sqrt{3}}{2}+\frac{1}{2}.\frac{\sqrt{2}}{2}.\frac{\sqrt{2}}{2}$
= 1
c) P = 1 + $\left ( \sqrt{3} \right )^{2}$ = 4
d) Q = $\frac{1}{\left ( \frac{\sqrt{3}}{2} \right )^{2}}-\left ( \frac{-1}{\sqrt{3}} \right )^{2}$
= 1