Advertisements
Advertisements
प्रश्न
The value of (1 + cot θ − cosec θ) (1 + tan θ + sec θ) is
विकल्प
1
2
4
0
Advertisements
उत्तर
The given expression is
`(1+cot θ-cosec θ )(1+tan θ+sec θ)`
Simplifying the given expression, we have
`(1+cot θ-cosec θ)(1+tan θ+sec θ)`
=`(1+cos θ/sin θ-1/sin θ)(1+sin θ/cos θ+1/cos θ)`
= `(sin θ+cos θ-1)/sin θxx (cos θ+sin θ+1)/cos θ`
= `((sin θ+cos θ-1)(cos θ+sin θ+1))/(sin θcos θ)`
=`({(sin θ+cos θ)-1}{(sin θ+cos θ)+1})/(sin θ cos θ)`
=`((sin θ+cos θ)^2-(1)^2)/(sin θ cos θ)`
=`((sin θ+cos θ)^2-(1)^2)/(sin θ cos θ)`
=`((sin^2 θ+cos^2θ+2 sin θcos θ)-1)/(sin θ cos θ)`
=`((sin ^2θ+cos^2θ)+2 sinθ cos θ-1)/(sin θcos θ)`
= `(1+2 sin θ cosθ-1)/(sinθ cos θ)`
=`( 2 sin θ cos θ)/(sin θ cos θ)`
=`2`
APPEARS IN
संबंधित प्रश्न
Prove that `\frac{\sin \theta -\cos \theta }{\sin \theta +\cos \theta }+\frac{\sin\theta +\cos \theta }{\sin \theta -\cos \theta }=\frac{2}{2\sin^{2}\theta -1}`
Prove the following trigonometric identities.
`(sec A - tan A)/(sec A + tan A) = (cos^2 A)/(1 + sin A)^2`
Prove the following trigonometric identities.
`(cot A - cos A)/(cot A + cos A) = (cosec A - 1)/(cosec A + 1)`
Prove that:
`(cos^3A + sin^3A)/(cosA + sinA) + (cos^3A - sin^3A)/(cosA - sinA) = 2`
If`( 2 sin theta + 3 cos theta) =2 , " prove that " (3 sin theta - 2 cos theta) = +- 3.`
If `cos theta = 7/25 , "write the value of" ( tan theta + cot theta).`
\[\frac{\tan \theta}{\sec \theta - 1} + \frac{\tan \theta}{\sec \theta + 1}\] is equal to
Prove that:
(cosec θ - sinθ )(secθ - cosθ ) ( tanθ +cot θ) =1
Prove the following identity :
sinθcotθ + sinθcosecθ = 1 + cosθ
Prove the following identity :
`sin^2Acos^2B - cos^2Asin^2B = sin^2A - sin^2B`
Prove the following identity :
`sinA/(1 + cosA) + (1 + cosA)/sinA = 2cosecA`
Prove the following identity :
`sqrt(cosec^2q - 1) = "cosq cosecq"`
Prove the following identity :
`tan^2A - tan^2B = (sin^2A - sin^2B)/(cos^2Acos^2B)`
If x = r sinA cosB , y = r sinA sinB and z = r cosA , prove that `x^2 + y^2 + z^2 = r^2`
If x = a sec θ + b tan θ and y = a tan θ + b sec θ prove that x2 - y2 = a2 - b2.
If x sin3θ + y cos3 θ = sin θ cos θ and x sin θ = y cos θ , then show that x2 + y2 = 1.
If a cos θ – b sin θ = c, then prove that (a sin θ + b cos θ) = `± sqrt("a"^2 + "b"^2 -"c"^2)`
Prove that
`(cot "A" + "cosec A" - 1)/(cot"A" - "cosec A" + 1) = (1 + cos "A")/"sin A"`
If 1 + sin2θ = 3 sin θ cos θ, then prove that tan θ = 1 or `1/2`.
(sec2 θ – 1) (cosec2 θ – 1) is equal to ______.
