Precalculus Solutions | Expert Assistance for Problems & Examples

Find $(5 s^{3} + 7 s^{2} + s - 5) - (7 s^{3} - 6 s^{2} + s + 3) =$ ?

Davon Trujillo 2022-05-02

Solve $(6 m^{3} - 5 m^{2} + 5 m - 2) - (3 m^{3} + 7 m + 2) =$ ?

Kale Mcclain 2022-05-02

Solve $(- 6 w^{3} - 5 w^{2} + 4 w - 3) - (w^{3} - 7 w^{2} - 7 w + 2) =$ ?

luminarc24lry 2022-05-02

Simple trigonometry
$\frac{{\sin 100}^{\circ}}{{\sin 60}^{\circ}} + \frac{1}{1 + 2 {\sin 50}^{\circ}} = 2 {\sin 50}^{\circ}$

Maximillian Patterson 2022-05-02

Showing that if $x = \sec θ + \tan θ$ ,then $x + \frac{1}{x} = 2 \sec θ$
I used a few simple trig identities but get nowhere. I am confused about this question a lot. I do not see where the theta and x can be in one.
None are squared so I cannot used the identities I would think. The only thing I can think to do is $x = \frac{1}{\sin θ} + \frac{\cos θ}{\sin θ}$

Deven Livingston 2022-05-02

Showing surjectivity of $f (x) = \frac{x - \sin x}{1 - \cos x}$
is strictly monotonically increasing on $x \in (0, 2 π)$ , I'd like to show the surjectivity of this function [to $(0, \infty)$ ]. However, I fail solving the equation
$y = \frac{x - \sin (x)}{1 - \cos (x)}$
with respect to x. Can I somehow use/apply the fact that $f (x) = \frac{u (x)}{u^{'} (x)}$ ?

windpipe33u 2022-05-01

Factor the polynomial $y^{2} + 2 y - 15$ .

estrigaslju 2022-05-01

What is $- n^{3} + 3 n^{2} - 3 n - 4$ minus $- 3 n^{2} + 2 n + 4$ ?

Wertgenib6 2022-05-01

Show that:
$2^{\sin x} + 2^{\cos x} \geq 2^{(1 - \frac{1}{\sqrt{2}})}$

tefoldaavv 2022-05-01

Show that the equation below is only possible when $x = y$
$\sec^{2} θ = \frac{4 x y}{{(x + y)}^{2}}$

Slade Higgins 2022-05-01

Show that ${| \frac{(1 - α) (1 + {(e^{j w})}^{- 1})}{2 (1 - α {(e^{j w})}^{- 1})} |}^{2} = \frac{{(1 - α)}^{2} (1 + \cos (w))}{2 (1 + α^{2} - 2 α \cos (w)}}$
So far, I have taken $| H_{L P} (e^{j ω}) | = \frac{1 - α}{2} \frac{1 + \cos (ω)}{1 - α \cos (ω)}$
Squaring it subsequently gives $\frac{{(1 - α)}^{2}}{4} \frac{{(1 + \cos (ω))}^{2}}{1 - 2 α \cos (ω) + α^{2} \cos^{2} (ω)}$

ahaar412rs7 2022-05-01

Show that $\sqrt{2 + \sqrt{2 + \sqrt{2 + 2 \cos 8 θ}}} = 2 \cos θ$

etudiante9c2 2022-05-01

Show that $\sin (2 x) + \sin (4 x) + . . . + \sin (2 n x) = \frac{\sin (n x) \sin ((n + 1) x}{\sin (x)}$

Taliyah Spencer 2022-05-01

Show that ${(1 - \cos θ - \sin θ)}^{2} - 2 (1 - \sin θ) (1 - \cos θ) = 0$

ulcerat9jr 2022-05-01

Show that
$\sin (x) = x \prod_{n = 1}^{\infty} (1 - \frac{4}{3} \sin^{2} (\frac{x}{3^{n}}))$
I know $1 - \sin^{2} x = (1 - \sin x) (1 + \sin x)$ but I'm not sure how to apply it.
Or maybe we need $2 \sin^{2} (x) = 1 - \cos (2 x)$ ?

Ricardo Berger 2022-04-30

Factor the polynomial $m^{2} + 14 m + 49$ .

Malachi Novak 2022-04-30

Factor the polynomial $a^{2} - 3 a + 2$ .

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