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बिंदु गुणनफल: इसे आंतरिक गुणनफल या अदिश गुणनफल भी कहा जाता है
माना कि दो सदिश
दो सदिशों का बिंदु गुणनफल निम्न द्वारा दिया जाता है:
जहाँ |
बिंदु गुणनफल के सूत्र:
गणना:
दिया गया है कि,
(â + b̂ + ĉ) = 0 ----(1)
हम जानते हैं कि,
(a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ca
⇒ (â + b̂ + ĉ)2 = â ⋅ â + b̂ ⋅ b̂ + ĉ ⋅ ĉ + 2(â ⋅ b̂ + b̂ ⋅ ĉ + ĉ ⋅ â)
समीकरण (1) से
⇒ 1 + 1 + 1 + 2 (â ⋅ b̂ + b̂ ⋅ ĉ + ĉ ⋅ â) = 0
⇒ (â ⋅ b̂ + b̂ ⋅ ĉ + ĉ ⋅ â) = - 3/2
Last updated on Jun 20, 2025
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