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nikitadnepr [17]
3 years ago
14

Anyone know the answer to these questions ?

Mathematics
2 answers:
DaniilM [7]3 years ago
6 0

Answer:

Find x;

tg 45º= x/7

x=7*tg45º

x=7*1=7

Answer= x=7

Find y;

Cos 45º=7/y

y=7/ Cos45º

y=7/(√2/2)=14/√2=14√2/2=7√2

Answer= 7√2≈9.9.

Step-by-step explanation:

nalin [4]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

Using the tangent ratio in the right triangle and tan45° = 1

tan45° = \frac{opposite}{adjacent} = \frac{x}{7} = 1 ( multiply both sides by 7 )

x = 7

---------------------------------------------

(8)

Using the cosine ratio and cos45° = \frac{1}{\sqrt{2} }

cos45° = \frac{adjacent}{hypotenuse} = \frac{7}{y} = \frac{1}{\sqrt{2} } ( cross- multiply )

y = 7\sqrt{2}

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