August 2021 0 16 Report
Решить примеры (1-tg^2 75°)/(2tg75°)
sin 11π/7 cos 3π/7+sin 11π/7 cos 3π/7

sin⁡(2x+π/4) sin⁡(2x-π/4)+cos⁡(2x+π/4) cos⁡(2x-π/4)
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