3 years ago

Urgent help please! Answer any of the questions!

1 answer:

8 0

#1. x = - (2y) / (1-y)

#2. x = (-4y-3)/(1-y)

I can't really see the other questions, so I only did the first two. Hope this helps!

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Brrunno [24]

Since beta is in the first quadrant, the final answer will be positive.

To find cos(beta) so we can use the half angle identity, we can substitute into the Pythagorean identity. Doing so gives us that

$\sin( \beta ) = \frac{ \sqrt{17} }{5}$

So, this means that

$\sin( \frac{ \beta }{2} ) = \sqrt{ \frac{1 - \frac{ \sqrt{17} }{2} }{2} } = \sqrt{ \frac{2 - \sqrt{17} }{4} } = \frac{ \sqrt{2 - \sqrt{17} } }{2}$

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2 years ago