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Oksi-84 [34.3K]
3 years ago
6

10. In ABC, if A and B are acute angles, and sin A= 10/13 what is the value of cos A ?

Mathematics
1 answer:
Margarita [4]3 years ago
5 0

Answer:

In triangle AB, A and B are acute angles so. AC and BC are right angles.

Sin A = 10/13

13 is the hypotenuse side and 10 is the opposite side.

To find cos A.

From pythagorean theorem:

Step-by-step explanation:

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Answer:

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A printer takes 30 minutes to print a banner and a poster. I will take 50 minutes to print a banner and three posters. How long
qwelly [4]

Answer:

It takes the printer 20 minutes to print a banner

Step-by-step explanation:

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8 0
3 years ago
The symbol ⊕ is used to denote exclusive or, so p ⊕ q ≡ (p v q) ^ ~ (p ^ q).
Elan Coil [88]

I'll use text forms of the logical symbols because copying/pasting on mobile is annoying.

⊕ = XOR

∨ = OR

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~ = NOT

↔ = IFF (meaning "if and only if")

→ = IMP (short for "implies")

and for logical equivalence I'll use a regular equal sign.

Then

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(a) By definition of XOR, we have

p XOR p = (p OR p) AND NOT (p AND p)

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(b) To rewrite XOR, first distribute the NOT over the AND using DeMorgan's law:

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p XOR q = (p OR q) AND (NOT p OR NOT q)

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= ((p AND NOT p) OR (p AND NOT q)) OR ((q AND NOT p) OR (q AND NOT q))

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p XOR q = (p AND NOT q) OR (q AND NOT p)

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p IFF q = (p IMP q) AND (q IMP p)

Also recall that IMP is logically equivalent to

p IMP q = p OR NOT q

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p IFF q = (p OR NOT q) AND (q OR NOT p)

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NOT (p IFF q) = NOT ((p OR NOT q) AND (q OR NOT p))

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= (NOT p AND q) OR (NOT q AND p)

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