Event JSON
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"content": "How to calculate the value of the sine, cosine, tangent and cotangent of the angle 0°, 30°, 45°, 60° and 90°. \n\nThe fingers are numbered sequentially numbers N={0, 1, 2, 3, 4}.\n\n[🎞️ Minor]\n\nhttps://video.nostr.build/3993dbb969609ac0fcce79c95f41a14020b29f827d7abce91d87c5a97f53ca10.mp4",
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