Precalculus Solutions | Expert Assistance for Problems & Examples

What is (-6,4) plus (-6,-5)?

Brody Collins 2022-04-04

Evaluate $4 a^{2} - 7$ a for a=-6.

ropowiec2gkc 2022-04-03

Find a linear mapping G that maps $[0, 1] \times [0, 1]$ to the parallelogram in the xy-plane spanned by the vectors $(2, 3)$ and $(4, 1)$ .

Tony Mccarthy 2022-04-03

Express $6 θ$ in terms of $\cos θ$

Polchinio3es 2022-04-03

Evaluating $\prod_{{k = 1}}^{100} [1 + 2 \cos \frac{2 π \cdot 3^{k}}{3^{100} + 1}]$

Kendall Daniels 2022-04-03

Evaluating $lim_{x \to 0} \frac{\cos (a x) - \cos (b x)}{\sin^{2} (x)}$

aidinacol7 2022-04-03

Evaluating $lim_{x \to 0} \frac{1 - \cos x}{{(2 x)}^{2}}$
I have this question in my book and the answer amounts to $\frac{1}{4}$ . I don't see how, and I think it's an error. Can you confirm it is an error?
$lim_{x \to 0} \frac{1 - \cos x}{{(2 x)}^{2}}$
I assume it would need to be $\cos^{2} x$ instead.

alparcero97oy 2022-04-03

Evaluating $(\cot \frac{π}{18} - 3 \cot \frac{π}{6}) \cdot (\csc \frac{π}{9} + 2 \cot \frac{π}{9})$
Try:
$\cot \frac{π}{18} \csc \frac{π}{9} - 3 \sqrt{3} \csc \frac{π}{9} + 2 \cot \frac{π}{18} \cot \frac{π}{9} - 6 \sqrt{3} \cot \frac{π}{9}$

rhedynogh0rp 2022-04-03

Evaluate $\cos [(\frac{1}{2}) [\arcsin (- \frac{3}{5})]]$

alparcero97oy 2022-04-03

Evaluate an integral of the form
$\int \cos (ω t) \ln \cos (ω t) d t$

Pizzadililehz 2022-04-03

Evaluate
$\sum_{n = 1}^{38} \sin (\frac{n^{8} π}{38})$

Rolando Wade 2022-04-03

Equivalent of $\frac{\sin (x)}{x} = \sin c (x)$ for $\frac{\cos (x) - 1}{x}$

jisu61hbke 2022-04-03

Does the identity $\cos^{2} (x) + \sin^{2} (x) = 1$ hold in a unital Banach algebra where 1 is the unit?
Let's assume that we have an unital Banach algebra T and we define sine and cosine using the normal power series definition as for $R$ . Let $x \in T$ and let 1 be the unit of T. Does the Pythagorean trigonometric identity $\cos^{2} (x) + \sin^{2} (x) = 1$ still hold?

amantantawq5l 2022-04-03

Task is to find
$\prod_{k = 0}^{\infty} \cos (x \cdot 2^{- k})$

Polchinio3es 2022-04-03

Solving trigonometry equation
$3 \sin^{2} x - 3 \cos^{2} x + \cos x - 1 = 0$

Marzadri9lyy 2022-04-03

Solving the equation:
$3 \cos x - \sin 2 x = \sqrt{3} (\cos 2 x + \sin x)$

Petrolovujhm 2022-04-03

Solving $2 \sin (θ + 17) = \frac{\cos (θ + 8)}{\cos (θ + 17)}$

amonitas3zeb 2022-04-03

Solving $\sin (\frac{x}{x^{2} + 1}) + \sin (\frac{1}{x^{2} + x + 2}) = 0$
Here is my way:
First write the equation as
$\sin (\frac{x}{2 (x^{2} + 1)} + \frac{1}{2 (x^{2} + x + 2)}) \cos (\frac{x}{2 (x^{2} + 1)} - \frac{1}{2 (x^{2} + x + 2)}) = 0$
Then the real solution can be find by
$\frac{x}{2 (x^{2} + 1)} + \frac{1}{2 (x^{2} + x + 2)} = 0$
which gives x=-1.

Pasegeabe85xy 2022-04-03

Solving $\sin 3 x \cdot \cos 3 x = \sin 2 x$

smaakt4ucq 2022-04-03

Solving $\sin \frac{12}{x} = - 3 \cos 2 x$

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.

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