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: 180° . 4 1 भार वी२ अकाल शा 30°tan”60° cos

Answer»

tan60 = 3^0.5.cos30 = (3^0.5)/ 2sin45 = 1/ (2^0.5)

4/ (tan60)^2 + 1/ (cos30)^2 - (sin45)^2= 4/3 + 4/3 - 1/2= 8/3 - 1/2= 13/6



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