2 years ago

The zeros of the equation x^2 – 7 x – 8 = 0 are ?

Mathematics

1 answer:

Anna [14]2 years ago

8 0

Find x? Ok done. Thank to me:>

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2 years ago

Sin α = 21/29, α lies in quadrant II, and cos β = 15/17, β lies in quadrant I Find sin (α - β).

Sever21 [200]

$\sin(\alpha-\beta)=\sin\alpha\cos\beta-\cos\alpha\sin\beta$

$\sin\alpha=\dfrac{21}{29}\implies \cos^2\alpha=1-\sin^2\alpha=\dfrac{400}{841}$

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3 years ago

HELP does anyone get these three questions?

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