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Fudgin [204]
3 years ago
6

Help me with this math question

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
5 0

Answer:3

Step-by-step explanation:

Just count from -1 to positive 2 the dot doesn’t move

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Prove. sin³A-cos³A/sinA-cosA = 1+sinAcosA​
katovenus [111]

Answer:

\frac{ \sin {}^{3} A -  \cos {}^{3}  A }{ \sin A -  \cos A}  \\  \\ { \sf{ =  \frac{ {( \sin A -  \cos A)}^{3}   +  3 \sin A \cos A( \sin A  -   \cos A)}{ \sin A -  \cos A}  }} \\  \\  =  { {( \sin A -  \cos A)}^{2}  +  3 \sin A \cos A} \\ { \sf{ = ( \sin {}^{2}  A +  \cos {}^{2}  A) - 2 \sin  A \cos  A + 3\sin  A \cos  A}}  \\  = { \sf{1 +\sin  A \cos  A }}

#hence proved

7 0
3 years ago
Find the least common multiple of 3 and 7
Sav [38]

The LCM of two prime numbers is generally just their product, since they share no common factors.


3 and 7 are both prime numbers, so their LCM (least common multiple) is simply the numbers multiplied together. In this case, the LCM is thus 21.

8 0
3 years ago
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given which of the following describes the boundary line and shading for the second inequality in the system
11Alexandr11 [23.1K]

Answer:

Solid Line, Shade Above

Explanation:

Given:

\left\{\begin{array}{l}
y

The second inequality in the system is:

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Since the inequality has an equal to sign attached, we use a solid line.

At (0,0)

\begin{gathered} y\geq x-4 \\ 0\geq-4 \end{gathered}

Since the inequality 0≥-4 is true, shade the side that contains (0, 0) as shown in the graph below:

So, we use a solid line and shade above the boundary line.

8 0
1 year ago
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2 years ago
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olganol [36]
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3 years ago
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