math20 help

Question

an angle between 0° and 180° that has the same sine value as sine 133°?

 

 

 

Answer 1

 An angle between 0^o and 180^o

Draw the angle 133^o in standard position.

The angle is positive, so we start at the x - axis and go 133^o counter clock wise.

Remember 180^o is a straight line.

The measure of reference angle is 180^o - 133^o = 47^o

Therefore, sine 47^o has the same sine value as sine 133^o.