What is the general solution for cos(x)=-0.7962 ?

The general solution for cos(x)=-0.7962 is x=2.49178…+2pin,x=-2.49178…+2pin

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cos(x)=-0.7962

cos (x) = - 0.7962

x = 2.49178 \dots + 2 πn, x = - 2.49178 \dots + 2 πn

Degrees

x = 142.76874 \dots^{\circ} + 36 0^{\circ} n, x = - 142.76874 \dots^{\circ} + 36 0^{\circ} n

Solution steps

cos (x) = - 0.7962

Apply trig inverse properties

cos (x) = - 0.7962

General solutions for

cos (x) = - 0.7962

cos (x) = - a \Rightarrow x = arccos (- a) + 2 πn, x = - arccos (- a) + 2 πn

x = arccos (- 0.7962) + 2 πn, x = - arccos (- 0.7962) + 2 πn

x = arccos (- 0.7962) + 2 πn, x = - arccos (- 0.7962) + 2 πn

Show solutions in decimal form

x = 2.49178 \dots + 2 πn, x = - 2.49178 \dots + 2 πn

1.04 cos^{2} (x) + 0.102 cos (x) - 0.935 = 0

\frac{sin ( 8 8 ^{\circ} )}{26} = \frac{sin ( x )}{21}

tan (x) = \frac{62}{21}

39.2 sin (x) = 22.07

tan (X) = 9.5144

What is the general solution for cos(x)=-0.7962 ?
The general solution for cos(x)=-0.7962 is x=2.49178…+2pin,x=-2.49178…+2pin