1-tan^2(45°-A)/1+tan^2(45°-A)
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hai bro this is your answer
=>2sin(x)sin(y) = sin(2x)
sin²x + cos²x = 1
tan(x-y) = (tan(x) - tan(y))/(1+tan(x)tan(y))
tan(45) = 1
tan(45 - A) = (tan(45) - tanA) / (1 + tan(45)tanA)
= (1-tanA)/(1+tanA)
= (1 - sinA/cosA) / (1 + sinA/cosA)
= (cosA - sinA) / (cosA + sinA)
tan²(45 - A)
= (cosA - sinA)² / (cosA + sinA)²
= (cos²A + sin²A - 2sinAcosA) / (cos²A + sin²A + 2sinAcosA)
= (1 - sin(2A)) / (1 + sin(2A))
_____swarnim ____####
=>2sin(x)sin(y) = sin(2x)
sin²x + cos²x = 1
tan(x-y) = (tan(x) - tan(y))/(1+tan(x)tan(y))
tan(45) = 1
tan(45 - A) = (tan(45) - tanA) / (1 + tan(45)tanA)
= (1-tanA)/(1+tanA)
= (1 - sinA/cosA) / (1 + sinA/cosA)
= (cosA - sinA) / (cosA + sinA)
tan²(45 - A)
= (cosA - sinA)² / (cosA + sinA)²
= (cos²A + sin²A - 2sinAcosA) / (cos²A + sin²A + 2sinAcosA)
= (1 - sin(2A)) / (1 + sin(2A))
_____swarnim ____####
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