Math, asked by omgami190, 5 months ago

Prove: sech⁴ ß-cos⁴ ß= 1-2 cos²ß

Answers

Answered by sagarrajeshwari53

1

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

Answered by SHANTANUBARUPAL

0

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