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dezoksy [38]
2 years ago
8

Simplify cos(2x)/ cos(x)-sin(x)

Mathematics
1 answer:
viva [34]2 years ago
5 0

Answer:

cosA + sinA

Step-by-step explanation:

Using trig. identities :

cos(A + B) = cosAcosB - sinAsinB

cos2A = cos²A - sin²A

cos2A = (cosA + sinA)(cosA - sinA)

Therefore, your question is :

=> cos2A/(cosA - sinA)

=> (cosA + sinA)(cosA - sinA)/(cosA - sinA)

=> cosA + sinA

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441 is 63% of what number
blagie [28]
<span>Question: 441 is 63% of what number?
=> 63% = 63% / 100% = 0.63
Since 441 is the 63% let’s find the value of 37% to get the toal of 100%
Solution, follow the formula
=> 0.63x = 441 – where x will be the value of the missing 100% value.
=> x = 441 / 0.63
=> x = 700 – the 100% value that have 441 as 63%
let’s check if we have the correct answer:
=> 700 * .63 = 441 </span>



6 0
3 years ago
Simplify: sin(pi/2 - x)csc x
Mnenie [13.5K]

Answer:

I hope this helped!

7 0
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Solve for x: x - 10 = -12
MakcuM [25]

Answer:

The answer is -2

Step-by-step explanation:

First you do +10 on both sides leaving you with x = -2

And that is your final answer (x=-2)

Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!

7 0
3 years ago
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Gena wants to estimate the quotient of –21.87 divided by 4.79. Which expression shows the best expression to estimate the quotie
ehidna [41]

Answer: -20 divided by 4.

Step-by-step explanation: I'm also doing this. I also don't really want to answer daily.

3 0
3 years ago
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Determine the slope of a line that is perpendicular to the line whose equation is x - 2y = 6.
Degger [83]

Answer:

The answer is -1/2

Step-by-step explanation:

We first start by removing x in order isolate the y variable

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Further, we simplify the equation in order to get the value of m (slope)

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Therefore, our slope is equivalent to -1/2

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