Question

I have another that's kickin my butt.
cos(2t)=1/2

Answer 1

when is cos(t) = 1/2 ??

Answer 2

yup and 0<t<2pi

Answer 3

do you know your basic trig angles and their values?

Answer 4

tryin to get better at it

Answer 5

trig is like learning the multiplication tables; just need to get it memorized :)

Answer 6

the basic triangle for this is the 60-30-90;

60 has a cos of 1/2

Answer 7

cos(2t)=1/2 was the equation

Answer 8

60 is pi/3 radians; so the question is:

2t = 60

t = 30 and t = 360-30

t = pi/6 and t = 330 = 12pi/6-pi/6 = 11pi/6

Answer 9

if you know that cos(60) = 1/2

the 2t = 60

t = 30....