you should know that
cos x = -1/2 when x = 120
sin x = \sqrt{3}/2 when x = 60
I will solve 1.
second let tan x = y for example
solve for y then x will equal arctan(y)
third like the first one
Hey,
I can't seem to do these 3 questions on my extension 1 assignment, hopefully sOmeone here can help.
Solve for x, 0 < or = x < or = 360 give answers to nearest minute.
1. 2cos(x+10)=-1
2. 3(tanx)^2-7tanx+4=0
3. Solve sin(2x-30)=sqrt[3]/2 for -180 < or = x < or = 180
I'm abit confused, any help appreciated.
Thanks,