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Gelneren [198K]
3 years ago
6

How to prove this using trig identities?

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
7 0

Step-by-step explanation:

tanB + cotB = (sinB)/(cosB) + (cosB)/(sinB)

 

                      = (sin2B + cos2B)/[(cosB)(sinB)]

 

                       = 1/[(cosB)(sinB)]

 

                        = (1/cosB)(1/sinB)

 

                        = (secB)(cscB)

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a decimal number to say 23.7 and it was rounded give a decimal number that is less than 22.37 and another that is greater than 2
chubhunter [2.5K]
23.7 IS GOING TO BE RIGHT BECAUSE 23.73 ROUNDS TO 23.7
6 0
3 years ago
Read 2 more answers
(BRAINLIEST TO THE PERSON WHO HELPS ME WITH THESE THREE QUESTIONS)
tigry1 [53]

Answer:

Cheryl's posts + 7 posts =Kevin Posts

K-C=7 or C+7+K I use them because C is Cheryl and K is Kevin

Operation=subtraction or addition because it could be K-C=7 or C+7+K

Cheryl wrote K-7=C posts

7 0
3 years ago
If x^3+ax^2-18x+b = (x+5)(x-4)(x+2) what is a and b
blondinia [14]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

(x + 5)(x - 4)(x + 2) =

(x + 5) ({x}^{2}  - 2x - 8) =

{x}^{3}  - 2 {x}^{2}  - 8x + 5 {x}^{2}  - 10x - 40 =  \\

{x}^{3}  + 3 {x}^{2}  - 18x - 40

_________________________________

Compare :

{x}^{3}  + 3 {x}^{2}  - 18x - 40

{x}^{3}  + a {x}^{2}  - 18x + b

Thus :

a = 3

and

b =  - 40

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

6 0
3 years ago
Brad buys a pack of 12 bottles of energy drink for £9.25
BARSIC [14]
Step One
Find the cost of one bottle
12 bottles cost 9.25 pounds.
1 bottle costs x

12 / 1 = 9.25/x    Cross multiply
12*x  = 1 * 9.25 Divide by 12
x = 9.25 / 12
x = 0.77

Remark
0.77 pounds sterling = 77 pennies

Step Two
find the profit on the sale of one bottle
100 - 77 = 23 pennies

Step Three
Find the % profit on one bottle.

% Profit = (profit on one bottle / Cost of 1 bottle.) * 100%
% Profit = (23 / 77) * 100 
% Profit = 29.87%   <<<<<<<< Answer.

 
8 0
3 years ago
If a = x+21, b = 4, c = x + 3, and d = 10, then the value of x =
Alex

Using the intersecting chord theorem:

a x b = c x d

x+21 * 4 = x+3 * 10

Simplify:

4x+84 = 10x+30

Subtract 30 from both sides:

4x + 54 = 10x

Subtract 4x from both sides:

54 = 6x

Divide both sides by 6:

x = 9

4 0
3 years ago
Read 2 more answers
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