pierdoodsu
2021-12-16
Answered

How do you find the exact value of ${\mathrm{cos}}^{-1}0$

You can still ask an expert for help

Louis Page

Answered 2021-12-17
Author has **34** answers

Explanation:

${\mathrm{cos}}^{-1}=-\mathrm{arccos}0$

What is the arc which cosine is zero?: two posibilities$90=\frac{\pi}{2}$ and $270=3\frac{\pi}{2}$

This is assuming that$\mathrm{cos}}^{-1$ is the inverse of cosine. There is no missunderstanding if use $\mathrm{arccos}$ instead of $\mathrm{cos}}^{-1$ Because $\mathrm{cos}}^{-1$ is also understud as $\frac{1}{\mathrm{cos}}=\mathrm{sec}$ which is different

What is the arc which cosine is zero?: two posibilities

This is assuming that

Heather Fulton

Answered 2021-12-18
Author has **31** answers

The trig ratios are defined as ratios of side lengths of a right-angled triangle. $\mathrm{cos}$ is the adjacent side divided by the hypotenuse, i.e. the length of the short side next to the angle being considered divided by the length of the long side next to it that isnt

asked 2022-01-21

How do you calculate $\mathrm{tan}\left(\mathrm{arccos}\left(\frac{5}{13}\right)\right)$ ?

asked 2021-12-31

Find the value of $\mathrm{tan}\left(\frac{\pi}{3}\right)$

asked 2022-01-23

Determine the greatest possible value of

$\sum _{i=1}^{10}\mathrm{cos}3{x}_{i}$

for real numbers$x}_{1},{x}_{2}\dots {x}_{10$ satisfying

$\sum _{i=0}^{10}{\mathrm{cos}x}_{i}=0$

My attempt:

$\sum \mathrm{cos}3x=\sum 4{\mathrm{cos}}^{3}x-\sum 3\mathrm{cos}x=4\sum {\mathrm{cos}}^{3}x$

So now we have to maximize sum of cubes of ten numbers when their sum is zero and each lie in interval [−1,1]. i often use AM GM inequalities but here are 10 numbers and they are not even positive. Need help to how to visualize and approach these kinds of questions.

for real numbers

My attempt:

So now we have to maximize sum of cubes of ten numbers when their sum is zero and each lie in interval [−1,1]. i often use AM GM inequalities but here are 10 numbers and they are not even positive. Need help to how to visualize and approach these kinds of questions.

asked 2021-10-26

if x=2 , f(x)=1

if x=3 , f(x)=4

if x=5 , f(x)=-2

if x=8 , f(x)=3

if x=13 , f(x)=6

f is twice variable for all real numbers.

1. Find f'(4)

2. Approximate${\underset{2}{\int}}^{13}{f}^{\prime}\left(x\right)dx$

2. Find the value of${\underset{2}{\int}}^{8}(3-{f}^{\prime}\left(x\right))dx$

if x=3 , f(x)=4

if x=5 , f(x)=-2

if x=8 , f(x)=3

if x=13 , f(x)=6

f is twice variable for all real numbers.

1. Find f'(4)

2. Approximate

2. Find the value of

asked 2021-12-13

How do you simplify $\mathrm{cos}\left({\mathrm{sin}}^{-1}x\right)$ ?

asked 2021-08-18

Write an equation in terms of x and y for the function that is described by the given characteristics. A sine curve with a period of

asked 2021-12-14

Which pair of angles has congruent values for the
$\mathrm{sin}x}^{\circ$ and the $\mathrm{cos}y}^{\circ$ ?

a.$35}^{\circ};{55}^{\circ$

b.$35}^{\circ};{145}^{\circ$

c.$35}^{\circ};{70}^{\circ$

d.$35}^{\circ};{35}^{\circ$

a.

b.

c.

d.