What is the general solution for cos(a)=0.3 ?

The general solution for cos(a)=0.3 is a=1.26610…+2pin,a=2pi-1.26610…+2pin

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cos(a)=0.3

cos (a) = 0.3

a = 1.26610 \dots + 2 πn, a = 2 π - 1.26610 \dots + 2 πn

Solution steps

cos (a) = 0.3

Apply trig inverse properties

a = arccos (0.3) + 2 πn, a = 2 π - arccos (0.3) + 2 πn

Show solutions in decimal form

a = 1.26610 \dots + 2 πn, a = 2 π - 1.26610 \dots + 2 πn

5 + 3 tan (x) = 4

cos (x) + sin (\frac{x}{2}) = 0

4 cos (2 θ) = 8 sin^{2} (θ)

cos (θ) = (\frac{5}{29})

sin (θ) = \frac{7.5}{6.5}

What is the general solution for cos(a)=0.3 ?
The general solution for cos(a)=0.3 is a=1.26610…+2pin,a=2pi-1.26610…+2pin