Question

The value of
(secpi/7)+(sec3pi/7)+(sec5pi/7) is

Answer 1

you would use a calculator...you would put (pi/7 then hit sec) then + and then do the next...there isnt really a way to do it without a calculator, especially for this problem.

Answer 2

i know but i ahve an idea
can we covert sec into cos

Answer 3

you can but it would be easier to just hit the 2nd button and then his sec.

Answer 4

((sec`)/(7))+((sec3`)/(7))+((sec5`)/(7))*is

Take the secant of ` to get -1.
(-(1)/(7))+((sec3`)/(7))+((sec5`)/(7))*is

Take the secant of 3` to get -1.
(-(1)/(7))+(-(1)/(7))+((sec5`)/(7))*is

Take the secant of 5` to get (1)/(0.96).
(-(1)/(7))+(-(1)/(7))+(((1)/(0.96))/(7))*is

Divide 1 by 0.96 to get 1.04.
(-(1)/(7))+(-(1)/(7))+((1.04)/(7))*is

Reduce the expression (1.04)/(7) by removing a factor of from the numerator and denominator.
(-(1)/(7))+(-(1)/(7))+(0.15)*is

Remove the parentheses that are not needed from the expression.
-(1)/(7)-(1)/(7)+(0.15)*is

Multiply is by each term inside the parentheses.
-(1)/(7)-(1)/(7)+0.15is

Combine the numerators of all expressions that have common denominators.
(-1-1)/(7)+0.15is

Subtract 1 from -1 to get -2.
(-2)/(7)+0.15is

Move the minus sign from the numerator to the front of the expression.
-(2)/(7)+0.15is

Answer 5

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