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`        sin-1x + sin-12x = ∏/3`
7 years ago

147 Points
```										Dear Aby
-1≤ 2x≤1
-1/2 ≤x≤1/2
now
sin-1x + sin-12x = ∏/3

sin-12x = ∏/3  -sin-1x
take sin

2x = sin∏/3 cos sin-1x  -cos∏/3  sinsin-1x
=√3 /2 √(1-x2)  -1/2 x
or  5x/2  =√3 /2 √(1-x2)
square
25x2 =3 (1-x2)
x2 =3/28
x= =±√3/28
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7 years ago
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