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goldfiish [28.3K]

3 years ago

15

CAN SOMEONE LOOK AT MY QUESTIONS I NEED HELP ASAP I JUST ASKED A QUESTION YESTERDAY ND I NEED HELP . JUST GO LOOK AT MY QUESTION

S FROM YESTERDAY

1 answer:

Lerok [7]3 years ago

7 0

Answer: sure :)))))))

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Write each decimal using a negative exponent.

leonid [27]

Answer:

The answer to your question is below

Step-by-step explanation:

When using scientific notation,

- when we move the decimal point to the right, the power will be negative.

- when we move the decimal point to the left, the power will be positive.

a) 0.00001 move the decimal point 5 places to the right 1 x 10⁻⁵

b) 0.001 move the decimal point 3 places to the right 1 x 10⁻³

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3 years ago

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Sin5A/SinA-cos5A/cosA=4cos2A

irina1246 [14]

Answer:

See Explanation

Step-by-step explanation:

$\frac{ \sin5A}{\sin A} - \frac{ \cos5A}{\cos A} = 4\cos2A \\ \\ LHS = \frac{ \sin5A}{\sin A} - \frac{ \cos5A}{\cos A} \\ \\ = \frac{ \sin5A \:\cos A - \cos5A \: \sin A}{\sin A \:\cos A } \\ \\ = \frac{ \sin(5A -A )}{\sin A \:\cos A} \\ \\ = \frac{ \sin 4A}{\sin A \:\cos A} \\ \\ = \frac{ 2\sin 2A \: \cos 2A}{\sin A \:\cos A} \\ \\ = \frac{ 2 \times 2\sin A \: \cos A \: \cos 2A}{\sin A \:\cos A} \\ \\ = \frac{ 4\sin A \: \cos A \: \cos 2A}{\sin A \:\cos A} \\ \\ =4\cos 2A \\ \\ = RHS \\ \\ thus \\ \\ \frac{ \sin5A}{\sin A} - \frac{ \cos5A}{\cos A} = 4\cos2A \\ \\ hence \: proved$

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3 years ago

In the diagram below, is an altitude of DEF. What is the length of ? If necessary, round your answer to two decimal places.

padilas [110]

I hope this helps you

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Step-by-step explanation:

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Step-by-step explanation:

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