-16n-14n when simplifying

Mathematics

1 answer:

galben [10]3 years ago

3 0

You collect the like terms and do -16-14 which is -30n

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SIZIF [17.4K]

The better way is, first we have to find the equivalent in degrees

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now we can change this value to $-15\º$

how do we get an angle like this?!

$30\º-45\º=-15\º$

then

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$\begin{Bmatrix}sin(30\º)&=&\frac{1}{2}\\\\sin(45\º)&=&cos(45\º)&=&\frac{\sqrt{2}}{2}}\end{matrix}\\\\cos(30\º)&=&\frac{\sqrt{3}}{2}\end{matrix}$

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$\boxed{\boxed{sin(-15\º)=sin(345\º)=\frac{\sqrt{2}-\sqrt{6}}{4}}}$

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3 years ago