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प्रश्न
(sec θ + tan θ) . (sec θ – tan θ) = ?
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उत्तर
(sec θ + tan θ)(sec θ – tan θ)
= sec2θ – tan2θ ......[(a + b)(a – b) = a2 – b2]
= 1 ......`[(because 1 + tan^2theta = sec^2theta),(therefore sec^2theta - tan^2theta = 1)]`
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संबंधित प्रश्न
`1/(secθ - tanθ)` = secθ + tanθ
sec4θ - cos4θ = 1 - 2cos2θ
secθ + tanθ = `cosθ/(1 - sinθ)`
`(tan^3θ - 1)/(tanθ - 1)` = sec2θ + tanθ
`(sin θ - cos θ + 1)/(sin θ + cos θ - 1) = 1/(sec θ - tan θ)`
खालील प्रश्नासाठी उत्तराचा योग्य पर्याय निवडा.
sin2θ + sin2(90 – θ) = ?
`(sintheta + "cosec" theta)/sin theta` = 2 + cot2θ हे सिद्ध करा.
`(1 + sec "A")/"sec A" = (sin^2"A")/(1 - cos"A")` हे सिद्ध करा.
sec2A – cosec2A = `(2sin^2"A" - 1)/(sin^2"A"*cos^2"A")` हे सिद्ध करा.
`(cot "A" + "cosec A" - 1)/(cot"A" - "cosec A" + 1) = (1 + cos "A")/"sin A"` हे सिद्ध करा.
