Question

sin^4x_cos^4x=2sin^2-1

Answer 1

Answer:

proved

Step-by-step explanation:

sin^4x - cos^4x

(sin^2x -cos^2 x)(sin^2x+cos^2x)

(sin^2x-(1-sin^2x))*1

2sin^2 x -1

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Answer 2

Answer:

solved

Step-by-step explanation:

LHS =sin^4x - cos^4 x= sin²x - cos²x = 2sin²x - 1 = RHS