1-sin^4A/cos^4A=2sec^2A-1
Answers
Answered by
4
Answer:
give me brainliest:)
Step-by-step explanation:
(1 - Sin⁴A) / Cos⁴A
= (1/Cos⁴A) - (Sin⁴A/Cos⁴A)
= Sec⁴A - Tan⁴A
= (Sec²A)² - (Tan²A)²
= (Sec²A + Tan²A) (Sec²A - Tan²A)
Similar questions