tan2x – 2tanx = 0 cos3x – cos4x + cos5x = 0 sin7x – sin3x = cos5x cos$^{2}$x – sin$^{2}$x = sin3x + cos4x cos2x – cosx = 2sin$^{2}$x . $\frac{3x}{2}

Question

tan2x – 2tanx = 0
cos3x – cos4x + cos5x = 0
sin7x – sin3x = cos5x
cos$^{2}$x – sin$^{2}$x = sin3x + cos4x
cos2x – cosx = 2sin$^{2}$x . $\frac{3x}{2}$
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Hưng Gia 11 months 2020-11-28T21:34:09+00:00 0 Answers 35 views 0

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