What would be the missing number

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

In triangle opq right angled at p op=7cm,oq-pq=1 determine the values of sinq and cosq

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)