Answer:
Step-by-step explanation:
take angle U as reference angle
using sine rule
sin U=opposite /hypotenuse
sin U=42/42
sin U=1
sin 90=1
therefore angle U=90 degree
The simplified answer is -2x-1 :)
Use the fact that for non-negative .
and , which means the square root of some number between 81 and 100 has an approximate value of 9.2371.