Question

solve this question please

Answer 1

Answer:

Step-by-step explanation is given in the pic

I hope it helps you

Pls marks as brainliest

Answer 2

Answer:

X = 120

Step-by-step explanation:

$Given:\frac{1-tan^2 60}{1+tan^2 60} = cos X$

∴ tan 60° = √3

$=>\frac{1-(\sqrt{3})^2}{1+(\sqrt{3})^2} = cos X$

$=>\frac{1-3}{1+3}=cos X$

$=>\frac{-2}{4}=cos X$

$=>\frac{-1}{2}=cos X$

$=>-cos 60 = cos X$

$=>-cos(180 - 120) = cos X$

∴ cos(180 - θ) = -cosθ

$=>cos 120 = cos X$

$=>x = 120$

Hope it helps!