What is the general solution for cos(x)=(8.5)/(9.9) ?

The general solution for cos(x)=(8.5)/(9.9) is x=0.53829…+2pin,x=2pi-0.53829…+2pin

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cos(x)=(8.5)/(9.9)

cos (x) = \frac{8.5}{9.9}

x = 0.53829 \dots + 2 πn, x = 2 π - 0.53829 \dots + 2 πn

Solution steps

cos (x) = \frac{8.5}{9.9}

Apply trig inverse properties

x = arccos (\frac{8.5}{9.9}) + 2 πn, x = 2 π - arccos (\frac{8.5}{9.9}) + 2 πn

Show solutions in decimal form

x = 0.53829 \dots + 2 πn, x = 2 π - 0.53829 \dots + 2 πn

cos^{3} (x) = - cos^{2} (x)

3 tan (2 x - π) + 1 = 0

3 sec (2 x) + 2 = 0

e^{t a n (x)} - 2 = 0

32 sec (θ) + 7 = 1

What is the general solution for cos(x)=(8.5)/(9.9) ?
The general solution for cos(x)=(8.5)/(9.9) is x=0.53829…+2pin,x=2pi-0.53829…+2pin