Find the general solutions of each of the following trigonometric equations:

a) 3sinēx+ cosx- 1 = 0

b) cos 6θ+ cos 2θ= 0

Thank you for your help :)

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- June 5th 2006, 05:30 PMLilDragonflyPlease help!
Find the general solutions of each of the following trigonometric equations:

a) 3sinē*x*+ cos*x*- 1 = 0

b) cos 6*θ*+ cos 2*θ*= 0

Thank you for your help :) - June 5th 2006, 05:53 PMmalaygoelQuote:

Originally Posted by**LilDragonfly**

using qudratic formula you will get cosx =1, -2/3

hence, x = [2n*pi ]and [2n*pi + cos inverse of (-2/3)] - June 5th 2006, 06:31 PMThePerfectHackerQuote:

Originally Posted by**LilDragonfly**

Thus,

Use the formula,

Thus,

- June 9th 2006, 07:21 PMLilDragonflyQuote:

Originally Posted by**malaygoel**

- June 10th 2006, 03:22 AMSoroban
Hello, LilDragonfly!

Quote:

This is what Malaygoel suggested . . .

We have: .

Then: .

And we have a quadratic: .

. . which factors: .

. . and has two equations to solve:

. . . . .

. . . . .

If they want*all*possible solutions, you can generalize . . . right?