What is the general solution for cos(x)=-2/pi ?

The general solution for cos(x)=-2/pi is x=2.26090…+2pin,x=-2.26090…+2pin

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cos(x)=-2/pi

cos (x) = - \frac{2}{π}

x = 2.26090 \dots + 2 πn, x = - 2.26090 \dots + 2 πn

Solution steps

cos (x) = - \frac{2}{π}

Apply trig inverse properties

x = arccos (- \frac{2}{π}) + 2 πn, x = - arccos (- \frac{2}{π}) + 2 πn

Show solutions in decimal form

x = 2.26090 \dots + 2 πn, x = - 2.26090 \dots + 2 πn

23 cos (z) + 2 sin (z) = 0

\frac{cos ( x ) + cos ( 3 x )}{cos ^{2} ( x ) - sin ^{2} ( x )} = 0

sin (x) = 2 cos^{2} (x) - 1

tan (t) = \frac{- 5}{12}

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

What is the general solution for cos(x)=-2/pi ?
The general solution for cos(x)=-2/pi is x=2.26090…+2pin,x=-2.26090…+2pin