Question

Find the measures of two angles, one positive and one negative, that are coterminal with π/10.

Answer 1

Co-terminal: \[\theta = \theta \pm 2k \pi \] for any integer k

Answer 2

adding or subtracting multiples of 2pi returns to the same angle

Answer 3

can you show me how you do that ?

Answer 4

\[\frac{ \pi }{ 10 } = \frac{ \pi }{ 10 } + 2\pi = \frac{ \pi }{ 10 } + 4\pi = \frac{ \pi }{ 10 } - 14\pi\]

Answer 5

choose one. and to add fractions you need the same denominator.

\[\frac{ \pi }{ 10 } + 2\pi = \frac{ \pi }{ 10 } + 2\pi \frac{ 10 }{ 10 } = \frac{ \pi }{ 10 } + \frac{ 20 \pi }{ 10 } = \frac{ 21\pi }{ 10 }\]

Answer 6

20π/10 ; -π/10 ?

Answer 7

neither unfortunately

Answer 8

a negative one would be:\[\frac{ \pi }{ 10 } - 2\pi = \frac{ \pi }{ 10 } - 2\pi \frac{ 10 }{ 10 } = \frac{ \pi }{ 10 } - \frac{ 20 \pi }{ 10 } = \frac{ -19\pi }{ 10 }\]

Answer 9

Ohh i'm confused haha

Answer 10

is it a multiple choice answer?

and which part confuses you?