What is the general solution for cos(A)= 2/3 ?

The general solution for cos(A)= 2/3 is A=0.84106…+2pin,A=2pi-0.84106…+2pin

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cos(A)= 2/3

cos (A) = \frac{2}{3}

A = 0.84106 \dots + 2 πn, A = 2 π - 0.84106 \dots + 2 πn

Solution steps

cos (A) = \frac{2}{3}

Apply trig inverse properties

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

Show solutions in decimal form

A = 0.84106 \dots + 2 πn, A = 2 π - 0.84106 \dots + 2 πn

2 sin (θ) = 3 (1 - cos (θ))

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

cos (t) = - 0, 5

sinh (x) = sinh (- x)

\frac{π}{4} = arctan (t)

What is the general solution for cos(A)= 2/3 ?
The general solution for cos(A)= 2/3 is A=0.84106…+2pin,A=2pi-0.84106…+2pin