What is the general solution for cos(x)=-0.73 ?

The general solution for cos(x)=-0.73 is x=2.38911…+2pin,x=-2.38911…+2pin

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cos(x)=-0.73

cos (x) = - 0.73

x = 2.38911 \dots + 2 πn, x = - 2.38911 \dots + 2 πn

Solution steps

cos (x) = - 0.73

Apply trig inverse properties

x = arccos (- 0.73) + 2 πn, x = - arccos (- 0.73) + 2 πn

Show solutions in decimal form

x = 2.38911 \dots + 2 πn, x = - 2.38911 \dots + 2 πn

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

9 tan^{2} (x) - 27 = 0

cos (x) = - 0.45

sin (4 x) cos (x) - sin (x) cos (4 x) = - \frac{1}{2}

4 tan (θ) - 1 = 0

What is the general solution for cos(x)=-0.73 ?
The general solution for cos(x)=-0.73 is x=2.38911…+2pin,x=-2.38911…+2pin