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Question
tan4θ + tan2θ = sec4θ - sec2θ
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Solution
डावी बाजू = tan4θ + tan2θ
= `tan^2θ(tan^2θ + 1)`
= tan2θ.sec2θ ....[∵ 1 + tan2θ = sec2θ]
= `(sec^2θ - 1)sec^2θ` .....[∵ `tan^2θ = sec^2θ - 1`]
= sec4θ - sec2θ
= उजवी बाजू
∴ tan4θ + tan2θ = sec4θ - sec2θ
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RELATED QUESTIONS
sec4θ - cos4θ = 1 - 2cos2θ
sec θ(1 - sin θ) (sec θ + tan θ) = 1
(sec θ + tan θ) (1 - sin θ) = cos θ
sec2θ − cos2θ = tan2θ + sin2θ हे सिद्ध करा.
`sqrt((1 + cos "A")/(1 - cos"A"))` = cosec A + cot A हे सिद्ध करा.
sec2θ – cos2θ = tan2θ + sin2θ हे सिद्ध करा.
sin4A – cos4A = 1 – 2cos2A हे सिद्ध करा.
(sin A + cos A) (cosec A – sec A) = cosec A . sec A – 2 tan A हे सिद्ध करा.
θ चे निरसन करा:
जर x = r cosθ आणि y = r sinθ
sin2θ + cos2θ ची किंमत काढा.
उकलः
Δ ABC मध्ये, ∠ABC = 90°, ∠C = θ°
AB2 + BC2 = `square` ...(पायथागोरसचे प्रमेय)
दोन्ही बाजूला AC2 ने भागून,
`"AB"^2/"AC"^2 + "BC"^2/"AC"^2 = "AC"^2/"AC"^2`
∴ `("AB"^2/"AC"^2) + ("BC"^2/"AC"^2) = 1`
परंतु `"AB"/"AC" = square "आणि" "BC"/"AC" = square`
∴ `sin^2 theta + cos^2 theta = square`
