Question

sin(-10pi/3).....why do you add +4pi?
sin(-10pi/3+2pi+2pi)...why not just 1 2pi??

Answer 1

because you want the angle to be between 0 and 2pi

adding just 2pi alone doesn't do the job but 4pi does

Answer 2

got cha. now can you tell me why it reduces to sin(2pi/3).....because i thought
-(10pi/3+4pi)=-6pi/3 which would equal -2pi

@jim_thompson5910

Answer 3

-10pi/3+2pi+2pi

-10pi/3+4pi

-10pi/3+12pi/3

(-10pi+12pi)/3

(2pi)/3

2pi/3

Answer 4

you can't just add -10pi and 4pi because you have to get the LCD first

Answer 5

oooooh okay! thank you so much!!

Answer 6

np