Precalculus Solutions | Expert Assistance for Problems & Examples

Is $\sin^{3} x = \frac{3}{4} \sin x - \frac{1}{4} \sin 3 x$ ?

Sarah-Louise Prince 2022-02-25

Prove this equality
$lim_{x \to 0} (\frac{\cos (π x)}{\sin (π x)} - \frac{π x}{\sin^{2} (π x)}) = 0$

Beverley Rahman 2022-02-25

Prove
$\cos (\frac{3 π}{2} + x) \cos (2 π + x) [\cot (\frac{3 π}{2} - x) + \cot (2 π + x) = 1$

Romana Newton 2022-02-25

Can anyone offer please help me solve the following trig identity.
$\frac{1 - \tan (\frac{x}{2})}{1 + \tan (\frac{x}{2})} = \frac{1 - \sin x}{\cos x} = \frac{\cos x}{1 + \sin x}$

Zeenat Horn 2022-02-25

I have to evaluate:
$\int_{0}^{\frac{π}{2}} \frac{\sqrt{\sin x}}{\sqrt{\sin x} + \sqrt{\cos x}} d x$

Ayden Case 2022-02-25

Show that:
$\forall n \in N ([{(2 + i)}^{n} + {(2 - i)}^{n}] \in R)$

Fearne Castro 2022-02-25

Find all values for x in the interval $[0^{\circ}, 360^{\circ}]$
$2 \cos x - \cos 2 x = \frac{5}{4}$

Aine Sellers 2022-02-25

I am trying to find this by using integration by parts but I am not sure how to do it.
$\int_{0}^{\frac{π}{2}} {(\sin x)}^{7} {(\cos x)}^{5} d x$

Mark Johns 2022-02-25

How can the following function such that no trigonometric functions are present:
$\sin^{3} (\cot^{- 1} (x))$

Vofteldetgpt 2022-02-25

How to evaluate
$\int_{0}^{\frac{π}{2}} 3 \cos^{2} θ d θ$

A rectangular page is to contain 24 square inches of print. The margins at the top and the bottom of the page are 1.5 inches, and the margins on the left and the right are 1 inch. What should be the measure of the page for the least amount of paper?

A statistic instructor ( with at least 20 years of teaching experience with the same course) has established that 10 percent of all students who take his course receive a failing grade. If 10 students have enrolled in his course for the next semester, the probability that more than one of these students will fail is

Is there more variation in "Hard physical activity" or in "Very hard physical activity"?

find the product of the vectors v= 2i-3j+k and vector w = 2i+j+k

A population of 19 scores has a mean of 8. One score of X = 6 is removed from the population. What is the value of the new mean?

n = 4; i and 2 i are zeros; f(-1)=30

Marlee Yates 2022-02-15

Use the fraph of a and g to fraph h(x)=(f+g)(x).

Jacob Stein 2022-02-14

Graphing Complex Numbers In Exercises 65–68, sketch the graph of all complex numbers z satisfying the given condition

Cassidy Johnson 2022-02-13

Let $A = [\begin{matrix} 1 & 0 & - 2 \\ - 2 & 1 & 6 \\ 3 & - 2 & - 5 \end{matrix}]$ and $b = [\begin{matrix} - 1 \\ 7 \\ - 3 \end{matrix}]$ . Define a linear transformation T by T(x)=AX. Determine a vector x whose image under T is b. Is the vector x that you found unique or not? Explain your answer.

Kelsie Cantu 2022-02-13

Add the complex numbers -1.22+j2.44 and -4.25+j5.25

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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