3 years ago

Simplify the expression sin 2x+ sin x + cos2x - 1.

Mathematics

1 answer:

dezoksy [38]3 years ago

7 0

Answer:

Sin(2x)+sin(x)+cos(2x)-1

Step-by-step explanation:

You might be interested in

Rewrite the function by completing the square.<br><br> f(x)=x^2-4x-26

Radda [10]

Answer:

$(x-2)^2-30$

Step-by-step explanation:

use the form $ax^2+bx+c$ to find the values of a, b, and c.

$a=1, b= -4, c = -26$

consider the vertex form of a parabola

$a(x+d)^2+e$

substitute the values of a and b into the formula $d=\frac{b}{2a}$

$d=\frac{4}{2(1)}$

simplify the right side.

find the value of e using the formula $e=c-\frac{b^2}{4a}$

$e=30$

5 0

2 years ago

How do I round 3.047 to the nearest hundred and show the math

goblinko [34]

The second place to the right after the decimal is the hundredth, so basically, to round, you cut off the rest of the decimal places afterwards. If the number after the hundredth is at or above 5, you should make the hundredth 1 higher, but if it is 4 or below, you will just leave it as is. In this case, 3.047 rounds to 3.05. There really is not any math work to show, but just the explanation.<span />

3 0

2 years ago

Kaitlyn was asked to find which expression below is equivalent to -3x + 5(x + 2)?

NISA [10]

The correct answer is c (2x+10)
I think her error was that she multiplied he numbers wrong

4 0

2 years ago

Read 2 more answers

Which set of numbers does -7 belongs to

inysia [295]

Do you have the whole question? The problem that you gave does not have a problem....

4 0