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Popular >

2cos^3(x)-cos^2(x)=0

Solution

2 cos^{3} (x) - cos^{2} (x) = 0

Solution

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn, x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

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Solution steps

2 cos^{3} (x) - cos^{2} (x) = 0

Solve by substitution

cos (x) = 0, cos (x) = \frac{1}{2}

cos (x) = 0 : x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn

cos (x) = \frac{1}{2} : x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

Combine all the solutions

x = \frac{π}{2} + 2 πn, x = \frac{3 π}{2} + 2 πn, x = \frac{π}{3} + 2 πn, x = \frac{5 π}{3} + 2 πn

Popular Examples

sin^2(x)-2=sin(x)

sin^{2} (x) - 2 = sin (x)

arccosh(x)=(2pi)/7

arccosh (x) = \frac{2 π}{7}

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arccosh (x) = \frac{2 π}{5}

-6sin(x)-4sin(2x)=0

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solvefor t,x=2cos(t)solve for

t, x = 2 cos (t)