Trigonometric formulas,identites and equation

solve each equation for nonnegative angles less than 360deg or 2 pi

1)2cos x=3

2)sinxcosx=0

3)sin theta - cos theta=0

Results 1 to 4 of 4

- Apr 25th 2006, 06:35 PM #1

- Joined
- Apr 2006
- Posts
- 19

- Apr 25th 2006, 08:26 PM #2

- Joined
- Nov 2005
- From
- someplace
- Posts
- 14,972
- Thanks
- 5

- Apr 25th 2006, 08:27 PM #3Originally Posted by
**cheesepie**

to 1) There isn't any real solution because in your problem cos(x) = 3/2.

But:

to 2) A product of two factors is zero if one (or both) factor is zero:

So

to 3)Add cos(x) to both sides of your equation and divide then by cos(x). You'll get the equation:

.

So

Greetings

EB

- Apr 25th 2006, 11:59 PM #4

- Joined
- Apr 2006
- Posts
- 19