What is the general solution for cos(u)= 7/25 ?

The general solution for cos(u)= 7/25 is u=1.28700…+2pin,u=2pi-1.28700…+2pin

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cos(u)= 7/25

cos (u) = \frac{7}{25}

u = 1.28700 \dots + 2 πn, u = 2 π - 1.28700 \dots + 2 πn

Solution steps

cos (u) = \frac{7}{25}

Apply trig inverse properties

u = arccos (\frac{7}{25}) + 2 πn, u = 2 π - arccos (\frac{7}{25}) + 2 πn

Show solutions in decimal form

u = 1.28700 \dots + 2 πn, u = 2 π - 1.28700 \dots + 2 πn

sin (x) + cos (x) = 1, 0 \leq x < 2 π

x, cos^{2} (x + y) = sin^{2} (x + y)

cot^{2} (x) + 3 cot (x) + 2 = cot (x) + 1

a^{2} = b^{2} + c^{2} - 2 b c \cdot cos (x)

3 sin^{2} (X) - cos (X) = 0

What is the general solution for cos(u)= 7/25 ?
The general solution for cos(u)= 7/25 is u=1.28700…+2pin,u=2pi-1.28700…+2pin