What is the general solution for cos(A)= 3/5 ?

The general solution for cos(A)= 3/5 is A=0.92729…+2pin,A=2pi-0.92729…+2pin

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cos(A)= 3/5

cos (A) = \frac{3}{5}

A = 0.92729 \dots + 2 πn, A = 2 π - 0.92729 \dots + 2 πn

Solution steps

cos (A) = \frac{3}{5}

Apply trig inverse properties

A = arccos (\frac{3}{5}) + 2 πn, A = 2 π - arccos (\frac{3}{5}) + 2 πn

Show solutions in decimal form

A = 0.92729 \dots + 2 πn, A = 2 π - 0.92729 \dots + 2 πn

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

arctan (2 x) + arctan (x) = \frac{π}{2}

sec (\frac{b}{4}) csc (\frac{b}{4}) = 2 csc (\frac{b}{4})

2 cos (x) - 5 = 3 cos (x) - 4

\frac{π}{2} = arctan (x)

What is the general solution for cos(A)= 3/5 ?
The general solution for cos(A)= 3/5 is A=0.92729…+2pin,A=2pi-0.92729…+2pin