Question-157494

Question Number 157494 by MathSh last updated on 23/Oct/21

Answered by MJS_new last updated on 24/Oct/21

let s = \sin x

\sqrt{- 9 s^{2} + 12 s + 13} = - \frac{4 s^{2} - 32 s - 13}{8}

s^{4} - 16 s^{3} + \frac{187}{2} s^{2} + 4 s - \frac{663}{16} = 0

no “ {nice}^{″} solution

s \approx - . 649720963256 \lor s \approx . 682719298518

Commented by MathSh last updated on 24/Oct/21

Thank you dear S er cool

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