Posted by **Lucy** on Monday, February 27, 2012 at 11:17pm.

solve for t:

0=4sin(2t)cos(2t)-sin(2t)

- math/cal/trig solve for t -
**drwls**, Monday, February 27, 2012 at 11:38pm
0 = sin(2t)[4 cos(2t) -1]

There are two possible solutions:

sin(2t) = 0

(which leads to t = 0 or pi/2)

and

cos(2t) = 1/4

which leads to other values of t.

t = (1/2)cos^-1(1/4)

- math/cal/trig solve for t -
**Lucy**, Monday, February 27, 2012 at 11:44pm
if cos2t=1/4 then t= what??

- math/cal/trig solve for t -
**L.Bianchessi**, Tuesday, February 28, 2012 at 12:19am
Cos inverse of 1/4 =2t

So do cos inverse of 1/4=75.52...

So...

75.52...= 2t

Solve for t.

T=37.76..

## Answer this Question

## Related Questions

- TRIG! - Posted by hayden on Monday, February 23, 2009 at 4:05pm. sin^6 x + cos^6...
- CALCULUS - Please help.. ʃ (4sin²x cos²×/sin 2x cos 2x)dx That's ...
- calculus - find max, min and saddle points of the give function f(x,y)=sin(x)+...
- trigonometry HELP pleasE! - these must be written as a single trig expression, ...
- trig - I dont understand this. can you please tell how you got each answer? ...
- Trig - Solve in terms of sine and cosine: sec(x) csc(x)- sec(x) sin(x) so far I ...
- trig - Reduce the following to the sine or cosine of one angle: (i) sin145*cos75...
- Pre Cal - Solve 4sin^2 x + 4sqrt(2) cos x-6 = 0 for all real values of x. My ...
- Math - Solving for Trig Equations - Solve the following equation for 0 less than...
- pre-cal - Simplify the given expression........? (2sin2x)(cos6x) sin 2x and cos ...

More Related Questions