2 years ago

Find the sum and express it in simplest form. (-3n^3 - 3n^2 - 5) + (8n^3 + 6n^2 - 4)

Mathematics

2 answers:

djverab [1.8K]2 years ago

5 0

Answer:

5n^3+3n^2-9

Step-by-step explanation:

you only add the coefficients

o-na [289]2 years ago

3 0

Answer:

Yfy

Step-by-step explanation:

Rhenish

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Simora [160]

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Step-by-step explanation:

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2 years ago

Please help i beg i never get these right

Anuta_ua [19.1K]

Answer:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

Step-by-step explanation:

Given

$\sin(105^o)$

Required

Solve

Using sine rule, we have:

$\sin(A + B) = \sin(A)\cos(B) + \sin(B)\cos(A)$

This gives:

$\sin(105^o) = \sin(60 + 45)$

So, we have:

$\sin(60 + 45) = \sin(60)\cos(45) + \sin(45)\cos(60)$

In radical forms, we have:

$\sin(60 + 45) = \frac{\sqrt 3}{2} * \frac{\sqrt 2}{2} + \frac{\sqrt 2}{2} * \frac{1}{2}$

$\sin(60 + 45) = \frac{\sqrt 6}{4} + \frac{\sqrt 2}{4}$

Take LCM

$\sin(60 + 45) = \frac{\sqrt 6 + \sqrt 2}{4}$

Rewrite as:

$\sin(60 + 45) = \frac{\sqrt 2 + \sqrt 6}{4}$

Hence:

$\sin(105) = \frac{\sqrt 2 + \sqrt 6}{4}$

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2 years ago

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padilas [110]

Answer:

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Step-by-step explanation:

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