What is the general solution for cos(A)=-3/25 ?

The general solution for cos(A)=-3/25 is A=1.69108…+2pin,A=-1.69108…+2pin

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cos(A)=-3/25

cos (A) = - \frac{3}{25}

A = 1.69108 \dots + 2 πn, A = - 1.69108 \dots + 2 πn

Degrees

A = 96.89210 \dots^{\circ} + 36 0^{\circ} n, A = - 96.89210 \dots^{\circ} + 36 0^{\circ} n

Solution steps

cos (A) = - \frac{3}{25}

Apply trig inverse properties

cos (A) = - \frac{3}{25}

General solutions for

cos (A) = - \frac{3}{25}

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

A = arccos (- \frac{3}{25}) + 2 πn, A = - arccos (- \frac{3}{25}) + 2 πn

A = arccos (- \frac{3}{25}) + 2 πn, A = - arccos (- \frac{3}{25}) + 2 πn

Show solutions in decimal form

A = 1.69108 \dots + 2 πn, A = - 1.69108 \dots + 2 πn

What is the general solution for cos(A)=-3/25 ?
The general solution for cos(A)=-3/25 is A=1.69108…+2pin,A=-1.69108…+2pin