Question

How the answer will be 1​

Answer 1

the equation can be written as

(sin²teta+cos²teta)²

(1)²

1

Answer 2

Answer:

LHS

sin⁴ θ + cos⁴θ + 2sin²θ cos²θ

since, (a+b)² = a² + b² + 2ab

= (sin²θ + cos²θ)²

= 1²

= 1

So LHS = RHS

Hence proved

Hope this helps ☺️