Question

solve for t, -4(cos2t)(sin2t) = 0

Answer 1

Can't you use the sin2x identity?

Answer 2

probably, but haven't gotten there yet, soo hahah

Answer 3

-4cos2t+sin2t=0
-4(1-2sin^2t)(2sintcost)=0
-4(2sintcost-4sin^3tcost)=0
-8sintcost+16sin^3tcost=0
2sin^3tcost=sintcost
sin^2t=1/2
sint=sqrt2/2
t=45,135

Answer 4

the answer is npi/4, where n is an integer

Answer 5

thats in radian,

45degrees = pi/4

Answer 6

if only i could understand your work

Answer 7

where you dont understand?

Answer 8

Do you have a formula sheet you can use? If you know the Sin(2x) identity, then it would be a lot simpler .

Answer 9

no, it should just be algebra