What is the general solution for cos(x)= 3/5 ?

The general solution for cos(x)= 3/5 is x=0.92729…+2pin,x=2pi-0.92729…+2pin

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cos(x)= 3/5

cos (x) = \frac{3}{5}

x = 0.92729 \dots + 2 πn, x = 2 π - 0.92729 \dots + 2 πn

Solution steps

cos (x) = \frac{3}{5}

Apply trig inverse properties

x = arccos (\frac{3}{5}) + 2 πn, x = 2 π - arccos (\frac{3}{5}) + 2 πn

Show solutions in decimal form

x = 0.92729 \dots + 2 πn, x = 2 π - 0.92729 \dots + 2 πn

3 sec^{2} (x) - 2 tan^{2} (x) - 4 = 0

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

cos (x) = \frac{1}{2}

cos (2 x) = sin (2 x) + 1

cos (x) = \frac{4}{5}

What is the general solution for cos(x)= 3/5 ?
The general solution for cos(x)= 3/5 is x=0.92729…+2pin,x=2pi-0.92729…+2pin