3 years ago

PLEASE HELP us the half angle formula for 7, 8 and 9(which is marked 8 on accident)

Mathematics

1 answer:

Gre4nikov [31]3 years ago

3 0

Answer:

$sin105 = \frac{ \sqrt{6} + \sqrt{2} }{4}$

$cos105 = \frac{ - { \sqrt{6} + \sqrt{2} } }{4}$

$tan105 = - 2 - \sqrt{3}$

Answered by GAUTHMATH

You might be interested in

A farm is to be built in the shape of Quadrilateral ABCD, as shown below. All four sides are equal.

lapo4ka [179]

9514 1404 393

Answer:

65.52 square feet

Step-by-step explanation:

The area of a rhombus is half the product of the diagonals.

A = (1/2)ab

A = (1/2)(12.6 ft)(10.4 ft) = 65.52 ft²

The area of the farm is 65.52 square feet.

6 0

3 years ago

Find the value of X. A. 9 B. 18 C. 4 D. 14

seropon [69]

Answer:

C is the answer

Step-by-step explanation:

10x=180-140

so,x=40÷10=4answer

5 0

2 years ago

3x3-27x=0 Solve by factoring a

Eddi Din [679]

After factoring $3x^3-27x=0$ the solutions are x=0 , x=3, x= -3

Step-by-step explanation:

We need to solve by factoring:

$3x^3-27x=0$

Solving:

$3x^3-27x=0$

Taking 3x common:

$3x(x^2-9)=0$

Now using formula $a^2-b^2=(a-b)(a+b)$

$3x((x)^2-(3)^2)=0\\3x(x-3)(x+3)=0$

$3x=0\,\,and\,\,x+3=0\,\,and\,\,x-3=0\\x=0\,\,and\,\,x=-3\,\,and\,\,x=3\\$

So, After factoring $3x^3-27x=0$ the solutions are x=0 , x=3, x= -3

Keywords: Factorization

Learn more about Factorization at:

#learnwithBrainly

5 0

3 years ago

Which is equivalent to the expression -8 i squared +3?

Lynna [10]

Answer:

Step-by-step explanation:

i² = -1

-8(-1) + 3 = 8 + 3 = 11

3 0

3 years ago

James Ran 1/4 of a mile in the morning and then ran 2/8 of a mile that evening what was the distance James ran

Setler79 [48]

Answer:

1/2

Step-by-step explanation:

1/4=2/8

2/8+2/8=4/8=1/2

4 0

3 years ago