Question

Prove that sin²Θ+cos²Θ=1

Answer 1

sinθ = P/H ---------------1
cosθ = B/H --------------2

Now , LHS

sin²θ + cos²θ
from 1 and 2

$\frac{P^2}{H^2} + \frac{B^2}{H^2}$

$\frac{P^2+B^2}{H^2}$ -----------3

By Pythagoras theorem 
P² + B² = H²

Putting this in 3

$\frac{H^2}{H^2}$
= 1

LHS = RHS

HENCE PROVED 

Answer 2

Step-by-step explanation:

Rigidity it is the property of matter to ressit the change of its shape. 2compressibility it is the property of matter in which its volume is decreased by applying force. 3 fluidityit is the ability of matter to flow. ... 6kinetic energy it is the energypossessed by the particles of matter due to its motion.