Math CentralQuandaries & Queries


Question from Nazrul, a teacher:

What is the solution of sinA+cosA=1 where A is an acute angle? Will A=0 degree be included in the solution? Please explain.


I would square both sides of sinA + cosA = 1 and then use the fact that sin2A + cos2A = 1 to simplify the expression.

Since an angle of zero degrees is an acute angle, A = 0 is one solution.


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