2U Trig Q?? :O (1 Viewer)

[A Leaf]

I got this off a 2U school internal exam (Gosford High) and I'm super confused as to why the answer is C, 5 solutions. What do you guys think? I got B, 4 solutions, so if anyone could explain I'd appreciate it

 

[integral95]

You have 2 equations





The sine equation only has one solution, the cos equation has 4 solutions between 0 and 2pi

 

[A Leaf]

ooooh! ok thanks - I didn't realise the period was pi not 2pi
ps. woah fast response haha

 

[HeroWise]