Wednesday

January 28, 2015

January 28, 2015

Posted by **Reiny** on Monday, April 16, 2007 at 10:54pm.

I must be missing something obvious.

If the second had been 3sin 2x it would be a straight forward question.

The way it stands I was able to "reduce" it to the equation

8sin^4 x - 8sin^2 x + 3sin x + 2 = 0

I tested this equation by subst. random values of angles in the original and this one, and got the same results, so it must be right.

??????

(must have been infected with a case of "oldtimers' disease)

2cos^2x+3sinx=0

2-2sin^2 x + 3 sinx=0

sin^2 x - 3/2 sin x - 1=0

quadratic equation..

sinx= (3/2 +-sqrt(9/4 +4) /2

sinx= 3/4 +- 5/4

sin x= -1/2 works.

check me.

Of course, of course, I knew it had to be that easy

I read the exponent as a multiplier of x

i.e. 2 cos^2 (2x) + 3 sin x .....

**Answer this Question**

**Related Questions**

trig - find the exact solutions 2cos^2x+3sinx=0 the way it stands, that is a "...

CHEM (DrBob222) - I had posted the question to that previous chem question, ...

trig - it says solve for all real solutions, compute inverse functions to 4 ...

science - Suppose a rocket ship in deep space moves with constant acceleration ...

help please - Devon's target heart rate zone is 140bpm—177bpm. Julian's target ...

Calculus - Find the derivative of y with respect to x: y=3sin^4(2-x)^-1 y=[3sin(...

Bobpursely - Bobpursely would you mind looking at my physics post. Just provide ...

Math (Trig.) - A boat sailing from A to B travels in a straight line until the ...

Grammar, - Please can you tell me if these are correct. Identify the noun ...

PHYSICS~Bobpursely - Bobpursely can I please recieve help from you. My posts are...