another trig

[Spectre927]

sinX=-S.R.3/2 in interval (0,2pie) I have no idea on this one. tried making it to 2sinxcosx=-S.R.3/2 but got lost.

 

[tkhunny]

Is that \(\displaystyle sin(x)=-\frac{\sqrt{3}}{2}\)? That should be on your memorization list. Look up the reference angle \(\displaystyle \frac{\pi}{3}\).

 

[Spectre927]

Ok, I see, Sin - 60. Thanks, I just refreshed on those last night for my test. I over analyze things sometimes.

 

[tkhunny]

Better check that again.

There are 2 answers and -60º is not one of them.

Domain - Domain - Domain...