3 years ago

Hurry !!!!!!!!! i will mark you brilliant

Mathematics

1 answer:

sesenic [268]3 years ago

4 0

Answer:

289

Step-by-step explanation:

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Prove the following identities : i) tan a + cot a = cosec a sec a

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Step-by-step explanation:

$\tan \alpha + \cot\alpha = \dfrac{\sin \alpha}{\cos \alpha} +\dfrac{\cos \alpha}{\sin \alpha}$

$=\dfrac{\sin^2\alpha + \cos^2\alpha}{\sin\alpha\cos\alpha}=\dfrac{1}{\sin\alpha\cos\alpha}$

$=\left(\dfrac{1}{\sin\alpha}\right)\!\left(\dfrac{1}{\cos\alpha}\right)=\csc \alpha \sec\alpha$

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3 years ago

But his teacher that he needed to measure the height of a building in which his classroom is located he backs away from the buil

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Answer:

<h2>IT'S 22 JUST FOUND OUT </h2>

Step-by-step explanation:

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3 years ago

In parallelogram ABCD, AE=x^2-6 and CE=5x what is the value of x ? What is AC?

lutik1710 [3]

Answer:

see explanation

Step-by-step explanation:

The diagonals of a parallelogram bisect each other, hence

AE = EC, that is

x² - 6 = 5x ( subtract 5x from both sides )

x² - 5x - 6 = 0 ← in standard form

(x - 6)(x + 1) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 6 = 0 ⇒ x = 6

x + 1 = 0 ⇒ x = - 5

However x > 0 ⇒ x = 6

AC = x² - 6 + 5x = 6² - 6 + 5(6) = 36 - 6 + 30 = 60

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3 years ago

eight of 50 video recorders in an inventory are known to be defective. what is the probability you randomly select an item that

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K<br> The solution is k<br> K/6+5=17<br> The solution is k=

aleksklad [387]

k=72

Explanation:

72/6=12

12+5=17

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2 years ago

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