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3 years ago

Find an exact value cos 75°

Mathematics

2 answers:

Drupady [299]3 years ago

5 0

Answer:

0.2588

Step-by-step explanation:

Vikentia [17]3 years ago

4 0

Answer:

(√3 - 1) / 2√2.

Step-by-step explanation:

Using the compound angle identity

cos(A + B) = cosA cosB - sinA sinB:-

cos 75

= cos (45 + 30)

= cos 45 cos 30 - sin 45 sin 30

= 1 / √2 * √3/2 - 1 / √2 * 1 / 2

= √3 / 2√2 - 1 / 2√2

= (√3 - 1) / 2√2.

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Which is the graph of x Greater-than-or-equal-to 98.6? A number line going from 95 to 103. A closed circle is at 98.6. Everythin

DENIUS [597]

Answer:

A number line going from 95 to 103. A closed circle is at 98.6. Everything to the right of the circle is shaded.

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We want to determine the graph of $x\geq 98.6.$

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3 0

3 years ago

Read 2 more answers

Could someone please help answer this, please no spam, will give brainliest, thank you!

Jobisdone [24]

Answer:

$x>-5$

Step-by-step explanation:

$\frac{-1}{5} x+1$

Subtract 1 from both sides

$\frac{-1}{5} x+1-1$

Simplify

$\frac{-1}{5} x$

Multiply both sides by -1, which reverses the inequality also

$\frac{-1}{5} x(-1)>1(-1)$

Simplify

$\frac{1}{5} x>-1$

Multiply both sides by 5

$5*\frac{1}{5} x>5(-1)$

Simplify

$x>-5$

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3 years ago