Asked by Evan
Is the given equation an identity or a conditional eqution
sin(-x) tan(-x) + cos(-x) = sec x
sin(-x) tan(-x) + cos(-x) = sec x
Answers
Answered by
Steve
let's get rid of all the - signs
sin(x) tan(x) + cos(x) = sec x
sin^2x/cosx + cosx = secx
(sin^2x + cos^2x)/cosx = secx
now what do you think?
sin(x) tan(x) + cos(x) = sec x
sin^2x/cosx + cosx = secx
(sin^2x + cos^2x)/cosx = secx
now what do you think?
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