Sunday

November 23, 2014

November 23, 2014

Posted by **ashley --- HELP PLEASEE!!!** on Sunday, April 10, 2011 at 10:46am.

- trig -
**drwls**, Sunday, April 10, 2011 at 11:22amUse the equation

sin(2x) = 2 sin x cos x

so that

6 sinx cosx -2 cosx = 0

cosx*(1 - 3sinx) = 0

(I divided out -2)

So the equation is satisfied wherever cosx = 0 or sinx = 1/3

x = pi/2 and 0.3398 radians are two solutions. There are others in other quadrants.

**Answer this Question**

**Related Questions**

trig - finding the equivalent polar equation 2x+3y=6 I got r=6/2cos(theta)-3sin...

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

Math - Can you help me with this? I did this many times and got different ...

Calc - How do you know what shape the graph in the xy-plane represented by x=...

trig - Find minimum value of 2cos x + 2cos y

trig - Find minimum value of 2cos x + 2cos y

trig - Find minimum value of 2cos x + 2cos y

Math - Trig Substitution - How can I solve the integral of x^3√(9-x^2) dx ...

help, bobpursely - Please take a look at DEVON's trig equation at 9:14 I must be...

Math Trigonometry - determine the amplitude and period of each function. 1) y = ...