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3 years ago

NEED HELP ASAP!!! PLZ HELP!!!

Mathematics

1 answer:

KatRina [158]3 years ago

6 0

Не знаю, что сказать но спасибо за очки

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I need help finding bc and ac

Vikki [24]

<h3>Given :</h3>

AB = 7
∠A = 45°

BC = ?
AC = ?

<h3>Solution :</h3>

From point A,

$\bf tan A = \dfrac{perpendicular}{base}$

$\bf \implies tan A = \dfrac{BC}{AB}$

$\bf \implies tan A = \dfrac{BC}{7}$

Now, we are given ∠A = 45°

$\bf \implies tan A = tan 45^{\circ}$

$\bf \implies tan 45^{\circ} = \dfrac{BC}{7}$

Now, we know that tan45° = 1

$\bf \implies 1 = \dfrac{BC}{7}$

$\bf \implies 1 \times 7 = BC$

$\bf \implies BC = 7$

Now, by Pythagoras' theorem,

AC² = BC² + AB²

$\bf \implies AC^{2} = (7)^{2} + (7)^{2}$

$\bf \implies AC^{2} = 49 + 49$

$\bf \implies AC^{2} = 98$

$\bf \implies AC = \sqrt{98}$

$\bf \implies AC = 7 \sqrt{2}$

$\pink{\bf \therefore \: values \: of \: AC = 7 \sqrt{2} \: and \: BC = 7}$

8 0

3 years ago

A shark begins 172.5 meters below sea level and then swam up 137.1 meters,. Where is the sharks location now in relation to sea

Mice21 [21]

Answer:

35.4m below sea level

Step-by-step explanation:

172.5 - 137.1 = 35.4

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2 years ago

Please someone answer this!

Kaylis [27]

Answer: 108$

Step-by-step explanation:

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3 years ago

This assignment is an exit ticket so yah lol

Schach [20]

Answer: #1 is that It is warmer on Monday then Tuesday #2 -.1 because It is warmer the Tuesday without being over 0

Step-by-step explanation:

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3 years ago

A equivalent expression to 9x-7y-6x

daser333 [38]

Answer:

$3x - 7y$

Step-by-step explanation:

<u>Step 1: Combine like terms</u>

<u /> $9x - 7y - 6x$

$(9x - 6x) - 7y$

$3x - 7y$

Answer: $3x - 7y$

8 0

4 years ago

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