Answer:
cos210=cos(180+30)=−cos30=−√32 . sin210=sin(180+30)=−sin30=−12 . 3(cos210+isin210) =3(−√32)+3i(−12). −(32)√3−(32)i. My favourite way of seeing that sin30=12 and cos30=√32 is ...
Step-by-step explanation:
But that's what I say personally
I would use what times 6 = 36 because 6*6+36
Factors of 4:
<span>1 and 4 </span>
<span>2 and 2 </span>
<span>
</span>
Answer:
I'll just do the entire thing since it's 13 points
<em>1.</em> 35
<em>2. </em>45
<em>3. </em>45
<em>4. </em>65
<em>5. </em>115
<em>6. </em>65
<em>7. </em>80
<em>8. </em>35
<em>9. </em>145
Answer:
The correct answer is B. 2π
Step-by-step explanation:
A rational number is one that can be represented using a fraction and an irrational number cannot be represented using a fraction.
-√4 = -2, which is a rational number
2π is not a rational number (we cannot express pi as a fraction exactly even though there are some close approximations)
2.2121... is also a rational number because it can be expressed as a fraction (21/99, or 7/33 simplified)
√225 is 15, which is a rational number
Therefore, the only irrational option is option B. 2π, which is your answer.
Hope this helps!
