Some of the letters are missing.Choose the correct alternative.
a b c a-b c a a b-c a - b b c- a
option:abba, abac, bbaa, ccaa
Please mention the logic used to reach the answer.
@joyjitpal said:There are 2 candles which can burn for 7hrs and 8hrs respectively. The two candles are litsimultaneously and initially the first candle was twice the length of the second candle. Howmany hours after the candles are lit, will the two candles be of equal length?a. 5.66 hours b. 6.22 hours c. 5.33 hours d. 5.83 hours
6.22 -- l-lt/8=2l-2lt/7
@anitito123 said:Some of the letters are missing.Choose the correct alternative.a b c a-b c a a b-c a - b b c- a option:abba, abac, bbaa, ccaaPlease mention the logic used to reach the answer.
abac abc aabc aabbc aabbcc
@ravi.theja said:@bs0409@Estallar12 bhai.. i guess der is a standard method for thhis kind of problems..ur views??
2 - 3 methods. You can use any.
Oh. Mera Chinese Rem ka Post bhi due hain. :|
@Estallar12 said:2 - 3 methods. You can use any.Oh. Mera Chinese Rem ka Post bhi due hain.
saar also add dis to ur list 😛 ... sm thing number line wala method or any other easy method.
Find the range of 1/(3cosX + 4sinX + 3)
how to find the greatest among 17^105 and 31^84?
@ravi.theja said:Find the range of 1/(3cosX + 4sinX + 3)
-0.54 to infinity..?
-0.54 at x= 235 and infinite at x =180 ??
@anitito123 said:how to find the greatest among 17^105 and 31^84?
((17)^5)^21 and ((31)^4)21 .. now evaluate and compare
@adityaknsit said:how did u get the lower limit?
divide n multiply the following by 5
3cos x + 4sinx + 3 = 5(3/5cosx + 4/5sinx) + 3 = 5sin(x + y) + 3 ... where cos y = 4/5
the range of this will be [-2, 8 ]
so the range of reciprocal will be -1/2 to 1/8
@techgeek2050 said:divide n multiply the following by 5 3cos x + 4sinx + 3 = 5(3/5cosx + 4/5sinx) + 3 = 5sin(x + y) + 3 ... where cos y = 4/5the range of this will be [-2, 8 ]so the range of reciprocal will be -1/2 to 1/8
in the above quoted range 0 willl be there . what happens if we reciprocal it? For me answer comes somewherre around -0.84 to infinity. Correct me if im wrong.
@adityaknsit said:how did u get the lower limit?
usually maximum happens at 45 degrees in case of sum of sin and cos functions. thats y.
since here a inverse is given i took 45 for minimum and of course the function tends to infi at 180.
@albiesriram said:in the above quoted range 0 willl be there . what happens if we reciprocal it? For me answer comes somewherre around -0.84 to infinity. Correct me if im wrong.
for what value of x will it reach infinity ?
@techgeek2050 said:divide n multiply the following by 5 3cos x + 4sinx + 3 = 5(3/5cosx + 4/5sinx) + 3 = 5sin(x + y) + 3 ... where cos y = 4/5the range of this will be [-2, 8 ]so the range of reciprocal will be -1/2 to 1/8
thanks for clearing it up man....
I think the lower limit is fine, but the upper limit should be infinity....
if sin(x + y)=-3/5......the denominator will turn 0 and hence the expression would be infinity
I think the lower limit is fine, but the upper limit should be infinity....
if sin(x + y)=-3/5......the denominator will turn 0 and hence the expression would be infinity
@techgeek2050 said:for what value of x will it reach infinity ?
x=>180
3Cos180 = -3
sin 180 =0
so (3+3cosx+4sinx) =0
y=>infi