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Some good trig practice problems for IITJEE Mains Mathematics
Problem: Find the value of $latex \cos^{4}\frac{\pi}{8} + \cos^{4}\frac{3\pi}{8}+\cos^{4}\frac{5\pi}{8}+\cos^{4}\frac{7\pi}{8}$. Problem: Find the value of $latex \cos{\theta}\cos{2\theta}\cos{4\th…