Answer:
The correct answer is first option
Step-by-step explanation:
<u>Points to remember
</u>
<u>Trigonometric ratio
</u>
Tan θ = Opposite side/Adjacent side
From the figure we can see that a right angled triangle ABC
BC = 5 cm, <A = 30° and <C = 90°
<u>To find the correct equation</u>
We have,
Tan θ = Opposite side/Adjacent side
Tan 30 =BC/AC
Tan 30 = 5/b
The correct answer is first option.