sin 60° cos 30° + cos 60° sin 30°

On substituting the values of various T-ratios, we get:
 sin 60o cos 30o + cos 60o sin 30o 

$=\left(\frac{\sqrt{3}}{2} \times \frac{\sqrt{3}}{2}+\frac{1}{2} \times \frac{1}{2}\right)=\left(\frac{3}{4}+\frac{1}{4}\right)=\frac{4}{4}=1$