(English Medium) ICSE Class 10 - CISCE Question Bank Solutions

Prove the following identity : 

`(cosecA - sinA)(secA - cosA) = 1/(tanA + cotA)`

Prove the following identity : 

`sin^4A + cos^4A = 1 - 2sin^2Acos^2A`

Prove the following identity : 

`(cotA + cosecA - 1)/(cotA - cosecA + 1) = (cosA + 1)/sinA`

Prove the following identity : 

`sinA/(1 + cosA) + (1 + cosA)/sinA = 2cosecA`

Prove the following identity :

`(1 + cosA)/(1 - cosA) = (cosecA + cotA)^2`

Prove the following identity :

`(cotA + tanB)/(cotB + tanA) = cotAtanB`

Prove the following identity :

`1/(tanA + cotA) = sinAcosA`

Prove the following identity :

`tanA - cotA = (1 - 2cos^2A)/(sinAcosA)`

Prove the following Identities :

`(cosecA)/(cotA+tanA)=cosA`

Prove the following identity : 

`((1 + tan^2A)cotA)/(cosec^2A) = tanA`

Prove the following identity : 

`cosecA + cotA = 1/(cosecA - cotA)`

Prove the following identity : 

`(cosecA)/(cosecA - 1) + (cosecA)/(cosecA + 1) = 2sec^2A`

Prove the following identity : 

`(1 + cosA)/(1 - cosA) = tan^2A/(secA - 1)^2`

Prove the following identity : 

`(cotA - cosecA)^2 = (1 - cosA)/(1 + cosA)`

Prove the following identity : 

`sqrt(cosec^2q - 1) = "cosq  cosecq"`

Prove the following identities:

`(tan"A"+tan"B")/(cot"A"+cot"B")=tan"A"tan"B"`

Prove the following identity : 

`sqrt((1 - cosA)/(1 + cosA)) = sinA/(1 + cosA)`

Prove the following identity : 

`sqrt((1 + sinq)/(1 - sinq)) + sqrt((1- sinq)/(1 + sinq))` = 2secq

Prove the following identity : 

`sqrt((1 + cosA)/(1 - cosA)) = cosecA + cotA`

Prove the following identities:

`(sec"A"-1)/(sec"A"+1)=(sin"A"/(1+cos"A"))^2`