Question

Q 1
Pls solve and dont give ans without solution

Answer 1

Step-by-step explanation:

AD=4cm

BD=3cm

CB=12cm

By Pythagoras theorem

AB²=AD²+BD²

AB²=(4)²+(3)²

AB²=16+9

AB=√25

AB=5cm

Again by Pythagoras theorem

AC²= AB²+BC²

AC²=(5)²+(12)²

AC²= 25+144

AC= √169

AC=13cm

Cot(theta)= Base

Perpendicular

= BC

AB

= 12

5

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Answer 2

Answer:

2.4cm

Step-by-step explanation:

In ΔABD,

∠D = 90°

⇒ AB^2 = AD^2 + BD^2  ........(PYTHAGORAS THEOREM)

⇒ AB=root(4^2+3^2)

⇒ AB = root(16+9)

⇒ AB = root(25)

⇒ AB = 5cm

⇒ cotθ = adjacent / opposite = 12/5 = 2.4