I agree
However, remember that there are multiple answers to these kind of questions,
for the standard domain from 0 to 2pi, there would be another in the fourth quadrant, namely 2pi-.7916 = 5.4916
to check, take cos(5.4916), then press your reciprocal key (1/x) on your calculator
find theta in radians to the nearest tenth if: sec(theta) = 1.4231
is this correct:
enter into calculator: cos^(-1)= 1/1.4231
get .7916232503, rounded to the nearest tenth = .8
1 answer
1 answer