sugarmochi sugarmochi

25-02-2017
Mathematics

contestada

If cosx =sin20, find the value of x, 0
Solve for x correct to the nearest minute given sin^2 x-3sin xcosx+2cos^2 x=0, where 0≤x≤180

Respuesta :

wolf1728 wolf1728

25-02-2017

First find the sine of 20 degrees = 0.34202
Now if we look up the arc cosine of 0.34202 it will be the angle x we are looking for.
arc cosine of 0.34202 = 70 degrees

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