Question

If you're good at exact values of trig ratios pea shell me with 13a

Answer 1

h = √12

Explanation:

use the Pythagorean

h² = 4² - 2²

h² = 16 - 4

h = √12

Answer 2

It is an equilateral triangle so its angles are equal 60°. From the definition, we know that:

`\sin60^\circ=(h)/(4)`

and

`\sin60^\circ=(√(3))/(2)`

so

`(√(3))/(2)=(h)/(4)\quad \Big|\cdot4\\\\\\h=(4\cdot√(3))/(2)\\\\\boxed{h=2√(3)}\\`