Question

$cos ^{4} - sec ^{4}$
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Answer 1

Given;

• cos⁴A - sec⁴A
• cos⁴A - 1/cos⁴A
• ( cos^8 A - 1 )/cos⁴A
• (cos⁴A-1)(cos⁴A+1)/cos⁴A
• (cos²A-1)(cos²A+1)(cos⁴A+1)/cos⁴A
• (cosA+1)(cosA-1)(cos²A+1)(cos⁴A+1)/cos⁴A

#answerwithquality

#BAL