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tan^2 45 degree - cos^2 60 degree = x sin 45 degree cos 45 degree tan 60 degree

Guest Jun 7, 2017
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tan(45) = 1     --->     tan2(45) = 1

cos(60) = 1/2  --->     cos2(60) = 1/4

sin(45) = sqrt(2) / 2

cos(45) = sqrt(2) / 2

tan(60) = sqrt(3)

 

tan2(45) - cos2(60)  =  x · sqrt(2) / 2 · sqrt(2) / 2 · sqrt(3)

    1        -      1/4     =  x · 2 · sqrt(3) / 4

                     3/4     =  (1/2) · sqrt(3) · x

          1/2 · sqrt(3)  =  x

geno3141  Jun 7, 2017

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