Question

Anyone know the answer to these questions ?

Answer 1

see explanation

Explanation:

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

tan45° =
`(opposite)/(adjacent)` =
`(x)/(7)` = 1 ( multiply both sides by 7 )

x = 7

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(8)

Using the cosine ratio and cos45° =
`(1)/(√(2) )`

cos45° =
`(adjacent)/(hypotenuse)` =
`(7)/(y)` =
`(1)/(√(2) )` ( cross- multiply )

y = 7
`√(2)`

Answer 2

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.

Explanation: