Question

find the function value round to four decimal places cos 38.43

Answer 1

Assuming that we are using degrees, we have that the value of:

$\cos (38.43)=0.783368\approx0.7834$

The easiest way to find this value is using an electronic calculator or find some place on the internet capable of doing calculations.

Then, the value for cos(38.43) = 0.7834 (rounded to four decimal places).