Ace - AI Tutor
Ask Our Educators
Textbooks
My Library
Flashcards
Scribe - AI Notes
Notes & Exams
Download App
John Paul Ong

John Paul O.

Divider

Viewed Questions

Suppose that the sound level of a conversation is initially at an angry $75 \mathrm{~dB}$ and then drops to a soothing $55 \mathrm{~dB}$. Assuming that the frequency of the sound is $500 \mathrm{~Hz}$, determine the (a) initial and (b) final sound intensities and the (c) initial and (d) final sound wave amplitudes.

Suppose that the sound level of a conversation is initially at an angry $75 \mathrm{~dB}$ and then drops to a soothing $55 \mathrm{~dB}$. Assuming that the frequency of the sound is $500 \mathrm{~Hz}$, determine the (a) initial and (b) final sound intensities and the (c) initial and (d) final sound wave amplitudes.

Principles of Physics

Two populations are independently surveyed using simple random samples of size $n,$ and two proportions, $p_{1}$ and $p_{2},$ are estimated. It is expected that both population proportions are close to . $5 .$ What should the sample size be so that the standard error of the difference, $\hat{p}_{1}-\hat{p}_{2},$ will be less than $.02 ?$

Two populations are independently surveyed using simple random samples of size $n,$ and two proportions, $p_{1}$ and $p_{2},$ are estimated. It is expected that both population proportions are close to . $5 .$ What should the sample size be so that the standard error of the difference, $\hat{p}_{1}-\hat{p}_{2},$ will be less than $.02 ?$

Mathematical Statistics and Data Analysis

Questions asked

ANSWERED

Sima Sarker verified

Numerade educator

Factor and simplify the following. [ frac{sec ^{4}(x)- an ^{4}(x)}{sec ^{2}(x)+ an ^{2}(x)} ]

View Answer
 divider
ANSWERED

Rashmi Sinha verified

Numerade educator

Find the exact values of the six trigonometric functions of each angle \( \theta \). (a) \[ \begin{array}{l} \sin (\theta)=\square \\ \cos (\theta)=\square \\ \tan (\theta)=\square \\ \csc (\theta)=\square \\ \sec (\theta)=\square \\ \cot (\theta)=\square \end{array} \]

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

(b) y ? x (1, ?1) sin(?) = cos(?) = tan(?) = csc(?) = sec(?) = cot(?) =

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

Find the exact values of the six trigonometric functions of each angle ?. (a) (-15, -8) sin(?) = cos(?) = tan(?) = csc(?) = sec(?) = cot(?) =

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

Find two exact values of ? in degrees (0° ? ? < 360°) for which cos(?) = ?2 / 2. Do not use a calculator. (Enter your answers as a comma-separated list.) ? = [ ] °

View Answer
 divider
ANSWERED

Sima Sarker verified

Numerade educator

Add and simplify the following. [ frac{cos ( heta)}{sin ( heta)}+frac{sin ( heta)}{cos ( heta)} ]

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

Find the exact values of the six trigonometric functions of the real number t. sin t = csc t = cos t = sec t = tan t = cot t =

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

Given that ( heta ) is an acute angle and ( an ( heta)=frac{5}{2} ), find the exact values of the other five trigonometric functions of ( heta ). [ egin{array}{l} sin ( heta)=square \ cos ( heta)=square \ csc ( heta)=square \ sec ( heta)=square \ cot ( heta)=square end{array} ]

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

The point is on the terminal side of an angle in standard position. Find the exact values of the six trigonometric functions of the angle. (5 1/2, -2sqrt{15}) sin ?? = cos ?? = tan ?? = csc ?? = sec ?? = cot ?? =

View Answer
 divider
ANSWERED

Manisha Sarker verified

Numerade educator

Find the reference angle ?' in degrees. ? = -210° ?' = [] ° Sketch ? in standard position and label ?'.

View Answer
 divider