Question

This is a trigonometry question

Find the side marked with a letter

Please give explanation also
Please
I want steps

Answer 1

Answer:

Let us consider y is the perpendicular

Then

$tan20 = \frac{y}{4}$

$y = 4*tan20$

Now

$cos70 = \frac{y}{x}$

$x = \frac{y}{cos70}$

Put the value of y here

$x = \frac{4*tan20}{cos70}$

Put the value of tan20 and cos70 from table and solve it further to get the real value of x.