How do you evaluate #3\sec (\frac{\pi }{4})-3\sec (0)#?
1 Answer
Dec 5, 2017
Explanation:
#"using the "color(blue)"trigonometric identity"#
#•color(white)(x)secx=1/cosx#
#rArr3sec(pi/4)-3sec(0)#
#=3xx1/(cos(pi/4))-3xx1/(cos(0))#
#=3xx1/(1/sqrt2)-3xx1/1#
#=3sqrt2-3#
#=3(sqrt2-1)#