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

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

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cos(A)= 4/5

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

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

Degrees

A = 36.86989 \dots^{\circ} + 36 0^{\circ} n, A = 323.13010 \dots^{\circ} + 36 0^{\circ} n

Solution steps

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

Apply trig inverse properties

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

General solutions for

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

cos (x) = a \Rightarrow x = arccos (a) + 2 πn, x = 2 π - arccos (a) + 2 πn

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

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

Show solutions in decimal form

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

cos (2 x + 15) = sin (\frac{x}{2} - 1 5^{\circ})

arcsin (x - 2) = \frac{π}{6}

9.8 sin (x) - 1.96 cos (x) = 8.54

4 cos (θ) - 23 = 0

\frac{3}{cot ( x )} = 8 - 5 tan (x)

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