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Feb 11, 2015



infinity

Jun 24, 2014

#### Value of sin 2π?



since sin(2npi) = 0
Thus n=1=>

Dec 10, 2014

#### Find the angle between the lines whose direction cosines are given by the equations 3l + m + 5n = 0 and 6mn - 2nl + 5lm = 0



Sol:
Given lines are 3l + m + 5n = 0

m = - (3l + 5n) -----------(1)

and 6mn - 2nl + 5lm = 0 ----------(2)

Substitute m in equation (2) we obtain
...

Feb 2, 2014

#### What is one one and onto function? Explain with example



Sol: for x1  x2 or f(x1)

Jan 20, 2015

#### 0∫π/2 log(sinx)dx



Let I = $\underset{\text{0}}{\overset{\frac{\pi }{}}{\int }}$

Oct 5, 2013

#### State and prove de-moivre's theorem,



De-moivre’s theorem:
(cosθ + i sinθ)n = (cos nθ + i sin nθ) for all n ϵ N
Proof:
We have to prove this theorem u...

Feb 24, 2015

#### There is the probability that a mathematics teacher will give an unannounced test during any class meeting is 1/ 5. If a student is absent twice, what is the probability that he will miss at least one test?



GIven that probability that a mathematics teacher will give an unannounced test during any class meeting is 1 / 5.
the probability of not missing the test = 1 - 1/5 = 4/ 5
T...

Nov 4, 2014



Nov 20, 2014



Feb 9, 2015