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»ï°¢ÇÔ¼ö °ø½Ä¿¡´Â ´ÙÀ½°ú °°ÀÌ ¿©·¯ °¡Áö°¡ ÀÖ½À´Ï´Ù:

  1. »çÀÎ ÇÔ¼ö(Sine function) °ø½Ä: sin(A + B) = sin(A)cos(B) + cos(A)sin(B) sin(A - B) = sin(A)cos(B) - cos(A)sin(B) sin(2A) = 2sin(A)cos(A) sin^2(A) + cos^2(A) = 1

  2. ÄÚ»çÀÎ ÇÔ¼ö(Cosine function) °ø½Ä: cos(A + B) = cos(A)cos(B) - sin(A)sin(B) cos(A - B) = cos(A)cos(B) + sin(A)sin(B) cos(2A) = cos^2(A) - sin^2(A) = 2cos^2(A) - 1 = 1 - 2sin^2(A)

  3. źÁ¨Æ® ÇÔ¼ö(Tangent function) °ø½Ä: tan(A + B) = (tan(A) + tan(B)) / (1 - tan(A)tan(B)) tan(A - B) = (tan(A) - tan(B)) / (1 + tan(A)tan(B))

  4. ÄÚźÁ¨Æ® ÇÔ¼ö(Cotangent function) °ø½Ä: cot(A) = 1 / tan(A)

  5. Ãʺ¯È¯ °ø½Ä(co-function) °ø½Ä: sin(pi/2 - A) = cos(A) cos(pi/2 - A) = sin(A) tan(pi/2 - A) = 1 / tan(A)

À§ÀÇ °ø½ÄµéÀº »ï°¢ ÇÔ¼ö¿¡ ´ëÇÑ ±âº»ÀûÀÎ °ø½ÄÀÔ´Ï´Ù. ÀÌ ¿Ü¿¡µµ ´Ù¾çÇÑ °ø½ÄµéÀÌ Á¸ÀçÇϸç, ÀÌ °ø½ÄµéÀ» ÅëÇØ ´Ù¾çÇÑ ¼öÇÐÀû °è»êÀÌ °¡´ÉÇÕ´Ï´Ù.

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