Question

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

Answer 1

@mathmath333

Answer 2

coterminal means repeating at full \(360^{\circ}\)

so \(\dfrac{π}{10}=18^{\circ}\) thus

coterminals of \(\dfrac{π}{10}=18^{\circ}\)

are \(18^{\circ}±k ~360^{\circ}\)

substitute \( k=1\)

coterminals are \(18+360=540^{\circ}~~ and~~ 18−360=-342^{\circ}\)