Precalculus Solutions | Expert Assistance for Problems & Examples

How to simplify:
$\frac{4 \sqrt{7}}{3} \cos (\frac{1}{3} \arccos \frac{1}{\sqrt{28}}) + \frac{1}{3}$

Arianna Villegas 2022-03-29

$\frac{1}{4} \tan (\frac{π}{8}) + \frac{1}{8} \tan (\frac{π}{16}) + \frac{1}{16} \tan (\frac{π}{32}) + \dots \dots \infty$
Try:
$\cos x \cdot \cos (\frac{x}{2}) \cdot \cos (\frac{x}{2^{2}}) \dots \dots \cos (\frac{x}{2^{n - 1}}) = \frac{1}{2^{n - 1}} \frac{\cos (x)}{\sin (\frac{x}{2^{n - 1}})}$
Could some help me how to solve ahead

Addison Fuller 2022-03-29

$\cos (\frac{π}{6} \cdot 2 π)$ in radians isn't equal to $\cos (30 \cdot 360)$ in degrees why?
I put $\cos (\frac{π}{6} \cdot 2 π)$ in radians mode on my calculator and i get -0.9890273166 and then I put $\cos (30 \cdot 360)$ in degrees mode and get 1, the answer is the complete opposite of what it should be and in case if you don't know $\frac{π}{6} \cdot 2 π$ converted to degrees equals 30∗360, so I really need an explanation.

ab0utfallingm1z2 2022-03-29

proving that $\sin β \cos (β + θ) = - \sin θ$ implies $\tan θ = - \tan β$

aidinacol7 2022-03-29

Proving $\sin 4 θ = 4 \cos^{3} θ \sin θ - 4 \cos θ \sin^{3} θ$
Using De Moivre's formula:
${(\cos θ + i \sin θ)}^{4} = \cos 4 θ + i \sin 4 θ$

cleffavw8 2022-03-29

Proving $\cos (w_{1} t) + \cos (w_{2} t) = 2 \cos (\frac{1}{2} (w_{1} + w_{2}) t) \cos (\frac{1}{2} (w_{1} - w_{2}) t)$

amonitas3zeb 2022-03-29

Prove: $\frac{\tan x}{1 - \cot x} + \frac{\cot x}{1 - \tan x} = \sec x \csc x + 1$

Tony Mccarthy 2022-03-29

Prove the following trigonometric identity
$\frac{\tan (\frac{π}{4} + x) - \tan (\frac{π}{4} - x)}{\tan (\frac{π}{4} + x) + \tan (\frac{π}{4} - x)} = 2 \sin x \cos x$

Jazmyn Holden 2022-03-29

Prove that:
$\tan^{2} 27^{\circ} + 2 {\tan 27}^{\circ} {\tan 36}^{\circ} = 1$

Isaac Hampton 2022-03-29

Prove that: $\tan (2 \tan^{- 1} (x)) = 2 \tan (\tan^{- 1} (x) + \tan^{- 1} (x^{3}))$
My Attempt $\tan^{- 1} (x) = A$
$x = \tan (A)$
Now, L.H.S $= \tan (2 \tan^{- 1} (x))$
$= \tan (2 A)$
$= \frac{2 \tan (A)}{1 - \tan^{2} (A)}$
$= \frac{2 x}{1 - x^{2}}$

alparcero97oy 2022-03-29

Prove that:
$\sqrt{2} {\sin 10}^{\circ} + \sqrt{3} {\cos 35}^{\circ} = {\sin 55}^{\circ} + 2 {\cos 65}^{\circ}$

limes14514qqmn 2022-03-29

Prove that:
$\frac{\sin^{2} (2 α)}{\sin^{2} (α)} = 4 - 4 \sin^{2} (α)$

Sanai Huerta 2022-03-29

Prove that $x^{16} - x^{11} + x^{6} - x + 1 > 0$ for $x \in R$

blestimd4pz 2022-03-29

prove that $\tan 2 x = \frac{2 \sin x \cos x}{1 - 2 \sin^{2} x}$

Landen Barber 2022-03-29

Prove that $\tan [\frac{π}{4} + \frac{1}{2} \cos^{- 1} (\frac{a}{b})] + \tan [\frac{π}{4} - \frac{1}{2} \cos^{- 1} (\frac{a}{b})] = \frac{2 b}{a}$

aanvarendbq28 2022-03-29

Prove that $\sin \frac{A}{2} \sin \frac{B}{2} \sin \frac{C}{2} \leq \frac{1}{8}$

rhedynogh0rp 2022-03-28

development of $\sum_{m = - (M - 1)}^{M - 1} e^{- i m h ξ}$
$\sum_{m = - (M - 1)}^{M - 1} e^{- i m h ξ} = \frac{\sin (M - \frac{1}{2}) h ξ}{\sin \frac{1}{2} h ξ}$
Can you show the process of the development?

mwombenizhjb 2022-03-28

Determine the values of x,y such that $\cos x \cos z \cos y + \sin x \sin y < 0$ for all z

Kason Palmer 2022-03-28

Determine sinus and cosinus : $2 \sin x + 3 \cos x = 3$

acidizihvzs 2022-03-28

Determine the smallest positive value of x(in degrees) for which:
$\tan (x + 100^{\circ}) = \tan (x + 50^{\circ}) \tan (x) \tan (x - 50^{\circ})$

Precalculus problems and solutions are hard to find online even though this topic is quite popular among college students majoring in Engineering. Keeping this fact in mind, we decided to provide you with a list of questions and answers that will help you with various precalculus problems. Regardless if it is related to equations or any other problem, these precalculus problems and composite functions examples and solutions below will help you see the logic and compare solutions as you check your original task.

Precalculus

Solve Precalculus Problems | Expert Help Available