What is the general solution for cos^2(x)+3cos(x)-4=0 ?

The general solution for cos^2(x)+3cos(x)-4=0 is x=2pin

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cos^2(x)+3cos(x)-4=0

cos^{2} (x) + 3 cos (x) - 4 = 0

x = 2 πn

Solution steps

cos^{2} (x) + 3 cos (x) - 4 = 0

Solve by substitution

cos (x) = 1, cos (x) = - 4

cos (x) = 1 : x = 2 πn

cos (x) = - 4 :

No Solution

Combine all the solutions

x = 2 πn

7 sin (x) = cos (x) - 3

sin (a) = \frac{3}{4}

sin (7 x) + sin (x) = 0, 0 \leq x \leq 2 π

t, - 2 sin (t) + 2 cos (2 t) = 0

2 cos (x) - 3 sin (x) = 1

What is the general solution for cos^2(x)+3cos(x)-4=0 ?
The general solution for cos^2(x)+3cos(x)-4=0 is x=2pin