What is the general solution for cos(a)= 9/14 ?

The general solution for cos(a)= 9/14 is a=0.87257…+2pin,a=2pi-0.87257…+2pin

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cos(a)= 9/14

cos (a) = \frac{9}{14}

a = 0.87257 \dots + 2 πn, a = 2 π - 0.87257 \dots + 2 πn

Solution steps

cos (a) = \frac{9}{14}

Apply trig inverse properties

a = arccos (\frac{9}{14}) + 2 πn, a = 2 π - arccos (\frac{9}{14}) + 2 πn

Show solutions in decimal form

a = 0.87257 \dots + 2 πn, a = 2 π - 0.87257 \dots + 2 πn

\frac{π}{2} = 2 sin (x)

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

\frac{20}{sin ( 3 5 ^{\circ} )} = \frac{16}{sin ( C )}

\frac{tan ( 2 θ )}{2} = tan (θ)

2 sin^{2} (3 x) - 3 cos (3 x) + 1 = 0, 0^{\circ} \leq x \leq 18 0^{\circ}

What is the general solution for cos(a)= 9/14 ?
The general solution for cos(a)= 9/14 is a=0.87257…+2pin,a=2pi-0.87257…+2pin