(ii) sin2θ+sin4θ+sin6θ+sin8θcos2θ+cos4θ+cos6θ+cos8θ=tan5θ\dfrac{\sin 2\theta + \sin 4\theta + \sin 6\theta + \sin 8\theta}{\cos 2\theta + \cos 4\theta + \cos 6\theta + \cos 8\theta} = \tan 5\thetacos2θ+cos4θ+cos6θ+cos8θsin2θ+sin4θ+sin6θ+sin8θ=tan5θ