What is the general solution for cos(x)= 21/29 ?

The general solution for cos(x)= 21/29 is x=0.76101…+2pin,x=2pi-0.76101…+2pin

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cos(x)= 21/29

cos (x) = \frac{21}{29}

x = 0.76101 \dots + 2 πn, x = 2 π - 0.76101 \dots + 2 πn

Solution steps

cos (x) = \frac{21}{29}

Apply trig inverse properties

x = arccos (\frac{21}{29}) + 2 πn, x = 2 π - arccos (\frac{21}{29}) + 2 πn

Show solutions in decimal form

x = 0.76101 \dots + 2 πn, x = 2 π - 0.76101 \dots + 2 πn

\frac{4}{sin ( 104.4 8 ^{\circ} )} = \frac{2}{sin ( a )}

sin (x + \frac{3 π}{2}) - cos (x + \frac{π}{2}) = 1

csc (x) - cot (x) = 1

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

cot (2 x) = 1.732

What is the general solution for cos(x)= 21/29 ?
The general solution for cos(x)= 21/29 is x=0.76101…+2pin,x=2pi-0.76101…+2pin