I need to find the points of intersection of sin 2x and sin 4x in degrees. I can do this kind of question but this one is difficult.

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- February 4th 2010, 08:42 AMStuck Manintersection of graphs
I need to find the points of intersection of sin 2x and sin 4x in degrees. I can do this kind of question but this one is difficult.

- February 4th 2010, 08:56 AMe^(i*pi)
- February 4th 2010, 09:16 AMStuck Man
Identities of sin 4x aren't part of my course so I should be using the ones usually learned earlier. I can use sin 2x and cos 2x.

- February 4th 2010, 11:12 AMStuck Man
I have done it using sin 4x = sin(2x + 2x). It was particularly hard compared to previous questions in the book.