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3 years ago

[(25 - 11) + (15-9)] *5

Mathematics

2 answers:

Vitek1552 [10]3 years ago

8 0

The answer is 75. This just needs to be at least 20 characters long lol

Katarina [22]3 years ago

7 0

The answer would be 75
Explanation:

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1+secA/sec A = sin^2 A / 1-cos A

Fofino [41]

Answer: see proof below

<u>Step-by-step explanation:</u>

$\dfrac{1+\sec A}{\sec A}=\dfrac{\sin^2 A}{1-\cos A}$

Use the following Identities:

sec Ф = 1/cos Ф

cos² Ф + sin² Ф = 1

<u>Proof LHS → RHS</u>

$\text{LHS:}\qquad \qquad \dfrac{1+\sec A}{\sec A}$

$\text{Identity:}\qquad \qquad \dfrac{1+\frac{1}{\cos A}}{\frac{1}{\cos A}}$

$\text{Simplify:}\qquad \qquad \dfrac{\frac{\cos A+1}{\cos A}}{\frac{1}{\cos A}}\\\\\\.\qquad \qquad \qquad =\dfrac{1+\cos A}{1}$

$\text{Multiply:}\qquad \qquad \dfrac{1+\cos A}{1}\cdot \bigg(\dfrac{1-\cos A}{1-\cos A}\bigg)\\\\\\.\qquad \qquad \qquad =\dfrac{1-\cos^2 A}{1-\cos A}$

$\text{Identity:}\qquad \qquad \dfrac{\sin^2 A}{1-\cos A}$

$\text{LHS = RHS:}\quad \dfrac{\sin^2 A}{1-\cos A}=\dfrac{\sin^2 A}{1-\cos A}\quad \checkmark$

3 0

3 years ago

PLEASE HELP!!!!!!!! I. NEED. AN. ANSWER. LIKE. RIGHT. NOW!!!!!!!!!!

AVprozaik [17]

Answer:

butter brick and clay sink

oak and wheat float

Step-by-step explanation:

5 0

3 years ago

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What is located closest to the orgin

jeka94

The zero is closed to the origin

6 0

3 years ago

Read 2 more answers

Find the area of the surface. the part of the surface z = xy that lies within the cylinder x2 + y2 = 81

Anika [276]

Ans: The area of the surface is: 1553.081

Explanation: Please see the image attached with this answer (find attachment).

4 0

3 years ago

The perimeter of a rectangle is 162 inches. what are the dimensions of the rectangle if the length is 7 times than 3 times the w

ankoles [38]

Answer:

3.68 inches × 77.28 inches

Step-by-step explanation:

Given that,

The perimeter of a rectangle is 162 inches.

Let the width is b.

ATQ,

Length = 7 times than 3 times the width

l = 7(3b) = 21b ...(1)

The perimeter of a rectangle is given by :

P = 2(l+b)

Put all the values,

162 = 2(21b+b)

81 = 22b

b = 3.68 inches

Put the value of b in equation (1)

l = 21b

= 21 (3.68)

= 77.28 inches

Hence, the dimensions of the rectangle are 3.68 inches × 77.28 inches

7 0

3 years ago