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lozanna [386]
2 years ago
6

Solve : cos X + sin X = 0 Pls all answers in radians thanks

Mathematics
1 answer:
Alisiya [41]2 years ago
4 0
<span>cos (X) + sin (X) = 0

Subtract cos(x) from each side:

sin(x) = -cos(x)

Divide each side by cos(x) :

sin(x) / cos(x) = -1

But sin/cos = tangent

<em>tan(x) = -1</em>

x = 135° and 315°

x = 3/4 pi radians  and  7/4 pi radians
</span>
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