Math, asked by inshirasi, 1 month ago

Prove that : Cos(3pi/4+x) + Cos(3pi/4-x) = √2cosx​

Answers

Answered by saichandanagoud04
0

cos3pi/4cosx-sin3pi/4 sinx-cos3pi/4cosx-sin3pi/4sinx

Step-by-step explanation:

-2sin3π/4sinx

-2(-sinpπ/4)sinx

√2sinx

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