Need help on trigonometry

DrTech SG

A maths... my friend just asked me a question... the paper is from Anderson's Secondary

Question goes like this,

sin(x+30) = 3cos(x+30)

find the values of x

Vel Vel SG

x=41.57

DrTech SG

yeah… i got the answers… 41.6 and 221.6… but i dunno/forgot the process in doing… I got the answers from graphmatica…

Ah Cek SG

...ok, let's continue line by line

sin(x+30) = 3cos(x+30)

tan(x+30)=3

....

DrTech SG

OH WTF...! I FEEL DUMB!!!

Thanks... Laughing