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3 years ago

The temperature in a freezer is set at -18°C. The temperature in a

Mathematics

1 answer:

Talja [164]3 years ago

6 0

Answer:

Positive

Step-by-step explanation:

refrigerator is 210, so it positive.

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Sin5A/SinA-cos5A/cosA=4cos2A

irina1246 [14]

Answer:

See Explanation

Step-by-step explanation:

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

5 0

3 years ago

+3 0 -4 +1 +5 -2 from lowest to highest

weqwewe [10]

Answer:

-4, -2, 0, 1, 3 <--- lowest to highest

3 0

3 years ago

Read 2 more answers

A number cube with the numbers 1 through 6 is rolled. What is the probability of the number cube showing a 3 or a multiple of 3?

VLD [36.1K]

Total number of possible outcomes = 6

Total number of outcomes with 3 or multiple of 3 = 2
They are 3 and 6

P(3 or multiple of 3) = 2/6 = 1/3

Answer : 1/3

4 0

4 years ago

Tim installs 50 square feet of his floor in 45 minutes. At this rate, how long does it take him to install 495 square feet?

77julia77 [94]

Answer:

99.5 minutes

Step-by-step explanation:

50=45

495=?

495×45÷50=99.5

6 0

3 years ago

Read 2 more answers

Sara made enough raspberry jam to fill 3

NeTakaya

Answer:

5/8 Jar

Step-by-step explanation:

I took the test...

3 0

3 years ago