1-sin^4θ/cos^4θ=2sec^2 θ -1 Prove by taking LHS
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• To Prove :
• Proof :
⠀⠀⠀⠀⋆ (a² - b²) = (a + b)(a - b)
⠀⠀⠀⠀⋆ (1 - sin² θ = cos² θ)
⠀⠀⠀⠀⋆ 1 / cos² θ = sec² θ
⠀⠀⠀⠀⋆ sin² θ / cos² θ = tan² θ
⠀⠀⠀⠀⋆ tan² θ = (sec² θ - 1)
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