Algebra
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Solve the following:
secx = -5
find sin 2x
find cos 2x
tan 2x
if tan x = 1/2
find sin x/2
cos x/2.
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Solution Summary
This solution is comprised of a detailed explanation to solve the following:secx = -5 find sin 2x and cos 2x.
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Solve the following:
secx = -5
find sin 2x
find cos 2x , tan 2x
We know that 1+tan^2(x) = sec^2(x)
Here we are given sec(x) =-5
so, sec^2(x) = (-5)^2 = 25
So 1+ tan^2(x) = 25 and tan^2 (x) = 25-1 => tan(x) = sqrt(24)=> sqrt(6*4)=> 2 sqrt(6)
tan(x) = 2 ...
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