philosphy111of
2021-11-20
Answered

Please, help toconvert the Polar Equation to Cartesian Coordinates:

${r}^{2}=\mathrm{sec}4\theta$

You can still ask an expert for help

Poul1963

Answered 2021-11-21
Author has **15** answers

So,

Donald Valley

Answered 2021-11-22
Author has **10** answers

Thank you for the answer!

asked 2021-08-20

Let P(x, y) be the terminal point on the unit circle determined by t. Then

asked 2022-01-24

Reaching upon 9=1 while solving x for

Substituting

9=1

The solution provided by the book

asked 2022-01-27

How do I solve this inequality? $3\mathrm{sin}\left(2x\right)>\mathrm{sin}\left(x\right)+\mathrm{cos}\left(x\right)+1$

asked 2022-04-06

If

$\frac{3-{\mathrm{tan}}^{2}\frac{\pi}{7}}{1-{\mathrm{tan}}^{2}\frac{\pi}{7}}=\alpha \mathrm{cos}\frac{\pi}{7}$

asked 2022-04-13

Maximizing the sum $\sum _{n=1}^{m}\mathrm{sin}n$

For which value of m, we will obtain the maximum sum?

Here's my approach :$\sum _{n=1}^{m}\mathrm{sin}n=\frac{\mathrm{sin}1}{4{\mathrm{sin}}^{2}\frac{1}{2}}-\frac{2\mathrm{cos}(m+\frac{1}{2})}{4\mathrm{sin}\left(\frac{1}{2}\right)}$

If we can minimize$2\mathrm{cos}(m+\frac{1}{2})$ then this will result in maximizing the sum.

But the problem is I can't quite figure out what the minimum value of$\mathrm{cos}(m+\frac{1}{2})$ is.

For which value of m, we will obtain the maximum sum?

Here's my approach :

If we can minimize

But the problem is I can't quite figure out what the minimum value of

asked 2022-04-07

I'm trying find an exact value for

$\mathrm{cos}\left(\frac{1}{3}\mathrm{arctan}\left(\frac{-10}{9\sqrt{3}}\right)\right)$

asked 2022-01-26

If $u=\sqrt{a{\mathrm{cos}}^{2}x+b{\mathrm{sin}}^{2}x}+\sqrt{b{\mathrm{cos}}^{2}x+a{\mathrm{sin}}^{2}x}$ , find the maximum and minimum value of $u}^{2$ .