16 sec2 θ – 40 sec θ + 25 = 0 ഉം θ ഒരു ന്യൂനകോണും ആണ്, അപ്പോൾ  tan θ യുടെ മൂല്യം എത്രയായിരിക്കും?

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  1. \(\frac{3}{4}\)
  2. \(\frac{4}{5}\)
  3. \(\frac{4}{3}\)
  4. \(\frac{3}{5}\)

Answer (Detailed Solution Below)

Option 1 : \(\frac{3}{4}\)
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നൽകിയിരിക്കുന്നത്:

16 sec2 θ – 40 sec θ + 25 = 0

കണക്കുകൂട്ടൽ:

⇒ 16 sec2 θ – 40 sec θ + 25 = 0

⇒ 16 sec2 θ – 2 × 4 × 5 sec θ + 25 = 0

⇒ (4secθ - 5)2 = 0

⇒ 4secθ = 5

⇒ secθ = 5/4

അപ്പോൾ,

⇒ 1 + tan2θ = sec2θ

⇒ tan2 θ = 25/16 - 1 = 9/16

∴ tanθ = 3/4

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