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Maths唔識抵死題~
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Solve these equations for 0
最佳解答:
Solve these equations for 0
其他解答:
The ans for the 2nd ans is correct, but is there any other methods in doing??|||||1. tan( 60-x ) = tan ( x-45 ) 60-x = x-45 or 60-x = 180+x-45 2x = 105 or 2x = -75 x = 52.5 deg. or 2x = 285 x = 52.5 deg. or x = 142.5 deg. 2. sin ( x+90) = tan x cos x sin ( x+90 ) = sin x cos x cos x = sin x cos^2 x = sin x 1 - sin^2 x = sin x sin^2 x - sin x + 1 = 0 there're no real solution
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