What is the general solution for cos(B)= 4/5 ?

The general solution for cos(B)= 4/5 is B=0.64350…+2pin,B=2pi-0.64350…+2pin

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cos(B)= 4/5

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

B = 0.64350 \dots + 2 πn, B = 2 π - 0.64350 \dots + 2 πn

Solution steps

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

Apply trig inverse properties

B = arccos (\frac{4}{5}) + 2 πn, B = 2 π - arccos (\frac{4}{5}) + 2 πn

Show solutions in decimal form

B = 0.64350 \dots + 2 πn, B = 2 π - 0.64350 \dots + 2 πn

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

cos (π + x) + sin (x - \frac{π}{2}) = 1

sin^{2} (a) + \frac{1}{sec ( a )} = \frac{5}{4}

\frac{csc ( x )}{cot ( x )} = 2

sin (4 x) + 6 cos (2 x) = 0

What is the general solution for cos(B)= 4/5 ?
The general solution for cos(B)= 4/5 is B=0.64350…+2pin,B=2pi-0.64350…+2pin