sinx-3sinx plus sin3x
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Answered by
1
LHS= Sin x - 3sinx + sin 3x
= Sin x - 6sin * 2x
= 5Sinx
Answer
= Sin x - 6sin * 2x
= 5Sinx
Answer
Answered by
0
sinx-3sinx+sin3x =sinx-3sinx+3sinx-4sin cube x
=sinx(1-4sin square x)=0
= sinx=0,sinx=1/2 ; -1/2
then x=0,π/6,5π/6
=sinx(1-4sin square x)=0
= sinx=0,sinx=1/2 ; -1/2
then x=0,π/6,5π/6
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