3 years ago

What is the exact value of cos 225º cos 75°?

Mathematics

2 answers:

love history [14]3 years ago

5 0

Answer:

$-\frac{\sqrt{3} -1}{4}$

Step-by-step explanation:

julsineya [31]3 years ago

3 0

Answer:

√

−

Step-by-step explanation:

i dont kno the other one

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Step-by-step explanation:

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3 years ago

Two equations are given below: a – 3b = 9 a = b – 3 What is the solution to the set of equations in the form (a, b)?

Vilka [71]

A-3b=9
a=b-3

b-3-3b=9
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Solution: (-9,-6)
----
Check:
-9=-6-3
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TRUE

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garik1379 [7]

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vitfil [10]

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aivan3 [116]

Answer:

Step-by-step explanation:

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