Math, asked by prafullasenapathi, 10 months ago

simplify
cos [A+45°] + sin [A-45°]

Answers

Answered by meenurana8696

2

Step-by-step explanation:

cos(A+B) =cosAcosB -sinAsinB

sin(A-B) =sinAcosB -cosAsinB

cos [A+45°] + sin [A-45]

cos Acos45-sinAsin45+sinAcos45-sin45cosA

we know sin45=cos45

=0

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