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3 years ago

COS2A+ cos2 A cot2A =cot 2 A

Mathematics

2 answers:

user100 [1]3 years ago

7 0

9514 1404 393

Explanation:

This is an identity.

cos²(A) +cos²(A)cot²(A) = cot²(A)

Transforming the left side, we have ...

= cos²(A)(1 +cot²(A))

= cos²(A)csc²(A)

= (cos(A)/sin(A))²

= cot²(A)

Kryger [21]3 years ago

6 0

Answer:

a= (π/4) + (kπ/2)

Step-by-step explanation:

I have attached the explanation above. hopefully this will help

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Help me please, thanks.<br><br> -Tornado

Ann [662]

Answer:

$x = - \frac{25}{3}$

Step-by-step explanation:

$\frac{10}{3} = \frac{x}{( - \frac{5}{2}) }$

<h3>i) simplify the complex fraction</h3>

$\frac{10}{3} = - \frac{2x}{5}$

<h3>ii) simplify the equation using cross multiplication</h3>

$5(10) = - 2x(3)$

$50 = - 6x$

<h3>iii) swap the sides of the equation</h3>

$- 6x = 50$

<h3>iv) divide both sides of the equation by -6</h3>

$\frac{ - 6x}{ - 6} = \frac{50}{ - 6}$

$x = - \frac{50}{6}$

<h3>v) simplify the fraction</h3>

$x = - \frac{25}{3}$

6 0

2 years ago

Read 2 more answers

Write a polynomial function in standard form with zeros at 0, 1, and 2.

BARSIC [14]

Answer:

Step-by-step explanation:

f(x)=(x-0)(x-1)(x-2)

=x(x^2-3x+2)

or f(x)=x^3-3x^2+2x

3 0

2 years ago

Solve the sequence:0,5,12,23,34____

MrRissso [65]

Step-by-step explanation:

the answer is 49

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4 0

2 years ago

1/2x+y=10<br> solving literal equation

hram777 [196]

Step-by-step explanation:

<u>1</u><u> </u> x-y = 10

multiply by 2

2* (<u>1</u> x+y) =10

x+y=20

5 0

2 years ago

Rewrite the expression (19x3 – 5x2 + 6x – 2)/(x + 1) in the form q(x) + r(x)/b(x) where q(x) = quotient, r(x) = remainder, and b

wolverine [178]

We are asked to perform the long division on the following expression.

$\frac{(19x^3-5x^2+6x-2)}{(x+1)}$

Let us perform the long division.

So, we have

Quotient: q(x) = 19x^2 - 24x + 30

Remainder: r(x) = -32

Divisor: b(x) = x + 1

Therefore, the equivalent expression is

$19x^2-24x+30-\frac{32}{(x+1)}$

The 3rd option is the correct answer.

7 0

11 months ago