HELP ASAP DONT UNDERSTAND AT ALL LOL

Mathematics

1 answer:

Phantasy [73]3 years ago

6 0

A line parallel to that line would have the same slope. A line perpendicular to the original would have the same slope, but it would be a DIFFERENT sign. (change positive to negative and vice versa)

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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

Is there more than one pair that could be congruent?

Alexeev081 [22]

Answer:

C and X , B and L , A and W , D and G are congruent

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2 years ago

What is the number that has the same absolute value as 81

LenaWriter [7]

The absolute value of -81 has the same absolute value as that of 81 because they both have the same distance to 0.

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3 years ago

Four glasses of milk and 3 snack bars have a total of 74 carbohydrates (carbs), and 3 glasses of milk and 4 snack bars have a to

Korvikt [17]

Answer: Snack=10carbs. Milk=11carbs

Step-by-step explanation:

(4x11)+(3x10)= 74

(3x11)+(4x10)= 73

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2 years ago

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erastovalidia [21]

Answer:

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Step by Step Explanation:

Subtract 9.5 from 21.23

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2 years ago