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2 years ago

8

Alejandro and Pedro are ring their bikes to school, after one mile they are 5/8 of the way there how much farther do they have t

o go?

1 answer:

lorasvet [3.4K]2 years ago

8 0

I did this problem too, just look it up on google, it really does help a lot

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Prove the trigonometric identity

Annette [7]

Answer:

Proved See below

Step-by-step explanation:

Man this one is a world of its own :D Just a quick question are you a fellow Add Math student in O levels i remember this question from back in the day :D Anyhow Lets get started

For this question we need to know the following identities:

$1+tan^{2}x=sec^2x\\\\1+cot^2x=cosec^2x\\\\sin^2x+cos^2x=1$

Lets solve the bottom most part first:

$1-\frac{1}{1-sec^2x} \\\\$

Take LCM

$1-\frac{1}{1-sec^2x} \\\\\frac{1-sec^2x-1}{1-sec^2x} \\\\\frac{-sec^2x}{1-sec^2x} \\\\\frac{-(1+tan^2x)}{-tan^2x}$

now break the LCM

$\frac{-1}{-tan^2x}+\frac{-tan^2x}{-tan^2x}\\\\\frac{1}{tan^2x}+1\\\\cot^2x+1$

because 1/tan = cot x

and furthermore,

$cot^2x+1\\cosec^2x$

now we solve the above part and replace the bottom most part that we solved with $cosec^2x$

$\frac{1}{1-\frac{1}{cosec^2x} } \\\\\frac{1}{1-sin^2x} \\\\\frac{1}{cos^2x}\\\\sec^2x$

Hence proved! :D

4 0

2 years ago

Suppose y varies directly as x, and Y=80 when x=16 . Which of the following statements is true?

liubo4ka [24]

The following answer is B because it shows that it has to multiply the x - axis by the slope (5) to make sure that it can be equat to the y - axis.

y = 5x
y =5(16)
y = 80

(x, y) = (16, 80)

5 0

2 years ago

3) Jackson ate a chocolate bar in 2 1/2 minutes. How much of the bar did he eat

nignag [31]

Answer:

0.4 of the chocolate bar.

Step-by-step explanation:

3 0

2 years ago

The total number of people that went to the out of town tournament was 42. How many players in chaperones went on the trip?

Makovka662 [10]

This sentence makes no sense....

7 0

2 years ago

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What is the solution to the equation? Need help with both 3 and 4

In-s [12.5K]

3. -1
4. 19/4
hope i helped!

4 0

2 years ago

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