requestbook
91

Step-by-step Answer
PAGE: 407SET: ExercisesPROBLEM: 91
Please look in your text book for this problem Statement

(a).

Show that .

The voltage is .

Where, the frequency is .

The power is

Where is resistance and is the time in seconds.

Substitute in .

Therefore, .

(b)

Observe the graph :

The graph of the function does not passing through the origin and shifted units downward.

hence,the graph of the function is a cosine function.

The geneal form of cosine function is .

Where, is amplitude and and is the phase shift.

Compare the equation with graph of the function.

Amplitude is and Period is .

.

Substitute all the values.

.

(c)

Deduce that .

Equate the two power functions.

Cancel the common terms.

.

(a) .

(b) .

(c) .



TESTIMONIALS

"I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!"

June Barnett

"Your site is amazing! It helped me get through Algebra."

Charles

"My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful."

Dan Pease

QUESTIONS? LET US HELP.
Simply chose a support option

My status

JOIN US ON:     
mathskey.com is not affiliated with any Publisher, Book cover, Title, Author names appear for reference only