rozwiąż równania
: 25 paź 2009, o 18:21
1. \(\displaystyle{ \sin ^{4}x + \cos ^{4}x = \cos 4x}\)
2. \(\displaystyle{ \sin ^{4} \frac{x}{3} + \cos ^{4} \frac{x}{3} = \frac{5}{8}}\)
3. \(\displaystyle{ \cos x = \sin 2x + \cos 3x}\)
4. \(\displaystyle{ \sin 5x + \sin 3x = \sin 4x}\)
5. \(\displaystyle{ \sin ^{2}2x = \sin 3x + \sin x}\)
6. \(\displaystyle{ \cos x\sin 7x = \cos 3x\sin 5x}\)
2. \(\displaystyle{ \sin ^{4} \frac{x}{3} + \cos ^{4} \frac{x}{3} = \frac{5}{8}}\)
3. \(\displaystyle{ \cos x = \sin 2x + \cos 3x}\)
4. \(\displaystyle{ \sin 5x + \sin 3x = \sin 4x}\)
5. \(\displaystyle{ \sin ^{2}2x = \sin 3x + \sin x}\)
6. \(\displaystyle{ \cos x\sin 7x = \cos 3x\sin 5x}\)