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3 years ago

Easy math I am just dumb right now

Mathematics

1 answer:

blagie [28]3 years ago

7 0

Answer:

r + 9 + r + 7

Step-by-step explanation:

Step 1:

2r + 16

Step 2:

r + r + 16

Answer:

r + 9 + r + 7

Hope This Helps :)

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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

3 years ago

I- Please someone help me -_- I hate math so much

zzz [600]

Answer:

5 & 13

Step-by-step explanation:

a. -9 + 4 = -5

Absolute Value = 5

b. Absolute value of -9 is 9

9 + 4 = 13

<em>hope this helps :)</em>

6 0

3 years ago

Read 2 more answers

Drag each label to the correct location on the table . Triangle EFG . Rectangle PQRS . Triangle TUV . Rectangle ABCD . Your choi

Tanya [424]

Answer:

there should be a pic or a diagram

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Y=-2x + 1<br> What is the value of y? (-5,___)

seraphim [82]

Answer: y=−2x+1

Step-by-step explanation:

5 0

3 years ago

If the square root of 61 is the longest side length in the triangle and the shorter sides are x and x+1, find the value of x tha

Tju [1.3M]

Answer:

x = 5

Step-by-step explanation:

You want to find x such that ...

x^2 +(x +1)^2 = 61

2x^2 +2x -60 = 0 . . . . . simplify, subtract 61

x^2 +x -30 = 0 . . . . . . . divide by 2

(x +6)(x -5) = 0 . . . . . . . . factor; solutions will make the factors be zero.

The relevant solution is x = 5.

5 0

3 years ago