3 years ago

QUICK can anyone help me. Big points for right answers.

Mathematics

1 answer:

klemol [59]3 years ago

7 0

No13.
Answer:
Cos(x+x)=cosx*cosx-sinx*sinx
=cos2(x)-sin2(x)
=(cosx+sinx)(cosx-sinx)

You might be interested in

Ama bought 12 eggs at $1.10 each. If 3 of the eggs got broken and sold the remaining at $1.45 each, calculate the

kkurt [141]

Answer:

1.1%

Step-by-step explanation:

cost price=1.10×12

=$13.20

selling price=(12-3)×1.45

=9×1.45

=$13.05

loss= cost price-selling price

=13.20-13.05

=0.15

loss percent=0.15/13.20×100

1.13636

1.1%

Please rate brainliest

4 0

2 years ago

A bookcase has two shelves. The top shelf has 10 more than 1/3 the number of books on the bottom shelf. There are 12 books on th

kobusy [5.1K]

Answer: b.14

Step-by-step explanation:

We have two shelves, the top shelf $s_{t}$ and the bottom shelf $s_{b}$ .

Now, firstly we are told the top shelf has 10 more than 1/3 the number of books on the bottom shelf. This can be expressed as:

$s_{t}=10+\frac{1}{3}s_{b}$ (1)

Then, we are told there are 12 books on the bottom shelf:

$s_{b}=12$ (2)

Substituting (2) in (1):

$s_{t}=10+\frac{1}{3}(12)$ (3)

$s_{t}=10+\frac{12}{3}$ (4)

$s_{t}=14$ (5) This is the number of books on the top shelf

Hence, the correct option is b.

6 0

3 years ago

Which of the following is closest to the actual distance in miles?

forsale [732]

Answer:

DAMMIT I BIT MY FINGER

Step-by-step explanation:

6 0

3 years ago

Plzzzzzz helppppp asappppp <br> ***will mark brainliest *****

Vanyuwa [196]

i am not sure but it think its 6 root 2

6 0

2 years ago

Name the intersection of plane KCG and a plane that contains L and D

egoroff_w [7]

Answer:

444

Step-by-step explanation:

4 0

3 years ago