4 years ago

If sin (7y) = cos (5y + 14), find y.

Mathematics

1 answer:

Reil [10]4 years ago

7 0

Answer:

Step-by-step explanation:

sin(7y)=cos(5y+14)=sin(90-(5y+14))=sin(76-5y)

7y=76-5y

12y=76

y=76/12=19/3

sin(7y)=cos (5y+14)=sin (90+(5y+14))=sin (5y+104)

7y=5y+104

2y=104

y=52

You might be interested in

the ratio of the price of a pencil to that of a book is 3 :4. if the price of a pencil is Rs. 15, find the price of a book?

tester [92]

The answer is 20 because if you divide 15:20 by 5, you get 3:4. hope this helps!

3 0

3 years ago

Read 2 more answers

How many solutions are ther to this equation.

Korolek [52]

There are multiple solutions and they will vary.

Hope this helps!
Can u plz mark me as brainliest? I really need it!

5 0

3 years ago

27^x = 9^x − 4 Question 1 options: x = 8 x = 4 x = −4 x = −8

Mariulka [41]

Answer:

x = -8

Step-by-step explanation:

Given the equation:

$27^x=9^{x-4}$

Note that

$27=3^3\\ \\9=3^2,$

then

$27^x=(3^3)^x=3^{3x}\\ \\9^{x-4}=(3^2)^{x-4}=3^{2(x-4)}$

Rewrite the equation as

$3^{3x}=3^{2(x-4)},$

then

$3x=2(x-4)\\ \\3x=2x-8\\ \\3x-2x=-8\\ \\x=-8$

4 0

3 years ago

Could anyone help me with these questions ASAP?

FrozenT [24]

8 is b because a circle is 360.

5 0

3 years ago

13 + 31 = 24 not 44 how on earth is this possible all help is great. Thanks.

Aneli [31]

It is 44. Can't argue about that

3 0

3 years ago