By Team Aakash Byju's | 15th January 2023
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cos A = 1 - cos A
∵ sin A + cos A = 1, the equation can be written as
cos A = sin A
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Substitute cos A = sin A, in the given equation
=> sin A + (sin A) = 1 (Substitution)
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(∵ cos A is the same as (cos A) )
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=> sin A + sin A = 1 (∵ (sin A) is the same as sin A)
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