Question

In the length ordem simplest medical form with a national denominator

Answer 1

Given;

The figure of a right angle triangle.

To find:

The value of x.

Solution:

In a right angle triangle,

`\cos \theta=(Adjacent)/(Hypotenuse)`

In the given right angle triangle,

`\cos (45^\circ)=(7)/(x)`

`(1)/(√(2))=(7)/(x)`
`[\because \cos (45^\circ)=(1)/(√(2))]`

On cross multiplication, we get

`1* x=7* √(2)`

`x=7√(2)`

Therefore, the value of x is
`7√(2)` units.