Asked/Added Questions From NCERT:

Question 1. Asked on :20 January 2019:10:13:42 AM


-Added by Rohit Rajput Mathematics » Maths


Himanshi Verma

 Cscϕ/secϕ = (1+cotϕ)/(1+tanϕ) 

LHS = (1+cotϕ)/(1+tanϕ) 

where cotϕ=cosϕ/sinϕ and tanϕ = sinϕ/cosϕ 

= (1+(cosϕ/sinϕ))/(1+(sinϕ/cosϕ)) 

= ((cosϕ+sinϕ)/sinϕ)/((cosϕ+sinϕ)/cosϕ) 

= cosϕ/sinϕ 

wkt cosϕ=1/secϕ 

and sinϕ=1/cosecϕ 

= cscϕ/secϕ 


Hence Proved

-Answered by Himanshi Verma On 22 January 2019:05:15:48 PM

Question 2. Asked on :18 January 2019:05:21:24 PM

Write the formula of cylinder open from the top ? 

-Added by khushi chauhan Mathematics » Maths


Himanshi Verma

 Total surface area= 2πr(r+h) -πr2

curved surface area = 2πrh+πr2

-Answered by Himanshi Verma On 03 February 2019:04:44:16 PM


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