3 years ago

PLEASE ANSWER 1-6 & SHOW YOUR WORK

Mathematics

1 answer:

Minchanka [31]3 years ago

4 0

Where is 1-6 at ????

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Solve: 2 + = 2. Give solutions in interval [0, 2)

Dovator [93]

$\because\cos 2x+\sin x=\sin 2x$ $\because\sin 2x=2\sin xcosx$ $\because\cos 2x=\cos ^2x-\sin ^2x$

→ Substitute cos 2x and sin 2x by their expressions

$\therefore\cos ^2x-\sin ^2+\sin x=2\sin x\cos x$

→ Subtract both sides by sin x

$\cos ^2x-\sin ^2x=2\sin xcosx-\sin x$

→ Take sin x as a common factor in the right side

$\therefore\cos ^2x-\sin ^2x=\sin x(2\cos x-1)$

From the graph, the equation has 4 solutions, the intersection points between the 2 graphs

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1 year ago

How many social security numbers are available if the only restriction is that the number 000-00-0000 cannot be assigned?

harkovskaia [24]

Each digit can be 0-9 ( 10 numbers)
there are 9 numbers in a social security number

multiply 10 nine times:
10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 x 10 = 1,000,000,000 ( 1 billion) possibilities.

the restriction is it can't be all zeros so subtract 1 from the total
1,000,000,000 - 1 = 999,999,999 combinations

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3 years ago

TRUE FALSE The supplement of 789 is 12

Burka [1]

The answer is False :)

7 0

3 years ago

Can someone helpp with this

m_a_m_a [10]

Here is my answer, hope to help you