hansampiofarz hansampiofarz

13-10-2016
Mathematics

contestada

sinx + 2cosx = 0 where 0<=x<=2pi, what can x be equal to?

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HomertheGenius HomertheGenius

20-10-2016

sin x + 2 cos x = 0
sin x = - 2 cos x / : cos x ( we will divide both sides by cos x )
sin x / cos x = - 2
tan x = - 2
x = tan^(-1) ( - 2 )
Answer:
x = - 63.6 ° = - 63° 36 `
or x = 296° 24 `

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