A student wishes to evaluate the function $\mathrm { f } ( x ) = x \sin x$, where $x$ is in radians, but has a calculator that only works in degrees. What could the student type into their calculator to correctly evaluate $\mathrm { f } ( 4 )$ ? A $( \pi \times 4 \div 180 ) \times \sin ( 4 )$ B $( \pi \times 4 \div 180 ) \times \sin ( \pi \times 4 \div 180 )$ C $4 \times \sin ( \pi \times 4 \div 180 )$ D $( 180 \times 4 \div \pi ) \times \sin ( 4 )$ E $\quad ( 180 \times 4 \div \pi ) \times \sin ( 180 \times 4 \div \pi )$ F $\quad 4 \times \sin ( 180 \times 4 \div \pi )$
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A student wishes to evaluate the function $\mathrm { f } ( x ) = x \sin x$, where $x$ is in radians, but has a calculator that only works in degrees.
What could the student type into their calculator to correctly evaluate $\mathrm { f } ( 4 )$ ?
A $( \pi \times 4 \div 180 ) \times \sin ( 4 )$\\
B $( \pi \times 4 \div 180 ) \times \sin ( \pi \times 4 \div 180 )$\\
C $4 \times \sin ( \pi \times 4 \div 180 )$\\
D $( 180 \times 4 \div \pi ) \times \sin ( 4 )$\\
E $\quad ( 180 \times 4 \div \pi ) \times \sin ( 180 \times 4 \div \pi )$\\
F $\quad 4 \times \sin ( 180 \times 4 \div \pi )$