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all topics 1st year mathematics - https://vuroki.ru/vysshaya_matematika... higher mathematics - • HIGHER MATHEMATICS 1st year FROM SCRATCH TRIGONOMETRY - • COSINE of an angle cos 10th grade trigonometry SOLUTION OF PROBLEMS AND EXAMPLES - https://vk.com/club49102005 This video talks about: astronomical calculations in ancient Greece expansion of sine and cosine in a Taylor series the equation of current oscillations in an electric circuit digital and analog data transmission Fourier transform the operation of audio and video codecs #sine #Fourier #cosine #Romanov #codec #mathematics