Math, asked by svptxb35tanishf, 3 months ago

sec⁴o-cos⁴ = 1 - 2cos²0

Answers

Answered by greetajitson2006

5

Step-by-step explanation:

LHS = sin4(x) - cos4(x)

= (sin2(x) - cos2(x)) × (sin2(x) + cos2(x))

= sin2(x) - cos2(x)

= 1 - cos2(x) - cos2(x)

= 1 - 2cos2(x)

= RHS

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