Math, asked by vaidehikumbhare26, 1 month ago

find the general solution of Cos 3∅ = to cos 2∅

Answers

Answered by devanshdhiman74
0

Answer:

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Step-by-step explanation:

cos3x−cos2x=0

−2sin(

2

3x+2x

)sin(

2

3x−2x

)=0

sin(

2

5x

)sin(

2

x

)=0

∴sin(

2

5x

)=0

(

2

5x

)=nπ

∴x=(

5

2nπ

)

∴sin(

2

x

)=0

(

2

x

)=nπ

∴x=2nπ

combiningbothresult

x=(

5

2nπ

)

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