CGL 2012 Tier 2 Preparations and Results

@sameer90sharma said: does anyone have 'uttam nagar' as their centre for tommorow ??
@gudda1122 ji ka hai



btw GM to all puys __/\__

Kaha hai sab log???
@rahulshaitan : gudmrng ITI shaab 😉 __/\__
@rahulshaitan : Gudmrng Inspector Shaaab __/\__

good morning bhai log....

@sampras said: Q. In a tri ABC ang BAC = ABC = 80 deg and D is any point on BC such that ang ADB = 30 deg then AB/DC = ?
bhai ye question explain karke batado....samajh nahi aaya.... sin formulas use karke bhi....koi explaination bata do
@sampras said: Q. In a tri ABC ang BAC = ABC = 80 deg and D is any point on BC such that ang ADB = 30 deg then AB/DC = ?
bhai ye question explain karke batado....samajh nahi aaya.... sin formulas use karke bhi....koi explaination bata do
@sumit1234567890
@alkoszzz said:
bhai ye question explain karke batado....samajh nahi aaya.... sin formulas use karke bhi....koi explaination bata do
apply sine rule in both triangle ABD and traiangle ADC , to get ratio of AB/DC which you would get as (sin20 * sin30 ) / (sin80 * sin 10) which can be simplified to be 1
@harsh1839 yaar yahi solve nahi ho ra....maine kabhi nahi kiya....sin * cosec lana hai kya???
@harsh1839 yaar yahi solve nahi ho ra....maine kabhi nahi kiya....sin * cosec lana hai kya???
@alkoszzz sin70/bd=sin30/ab=sin80/ad

sin10/cd=sin20/ad=sin150/ac
now solve....
@alkoszzz said:
@harsh1839 yaar yahi solve nahi ho ra....maine kabhi nahi kiya....sin * cosec lana hai kya???
convert sin20 to 2sin10cos10 , sin30 we already know cos 10 is same as sin 80 so everythng gets cancelled
@sumit1234567890 c i have reached here (sin20 * sin30 ) / (sin80 * sin 10) but i dnt know wat to do next??
@alkoszzz harsh ne likh diya hai

ty both of u 😁

@alkoszzz said:
bhai ye question explain karke batado....samajh nahi aaya.... sin formulas use karke bhi....koi explaination bata do
what are the options???
@viksg mera answer to ab/dc=2/1 aa ra hai
@alkoszzz said:
@viksg mera answer to ab/dc=2/1 aa ra hai
i am getting 3/1....
@alkoszzz said:
@viksg mera answer to ab/dc=2/1 aa ra hai
answer is 1 , check ur calculation after what i have told u to simplify
@harsh1839 true...2 and 2 will be cancelled..shucks...thnx :)
@alkoszzz Equal Annual Instalment under CI , x= Pr/100*[1-(100/100+r)^n]

or is it (100p)/(100t+(rt(t-1))/2)