Questions asked by Prashant S.
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#2(sin^6A+cos^6A)3(sin^4A+cos^4A)=1#?

Solute seperates as a solid when a saturated solution is cooled. Why ?

Concentrated sulphuric acid should not be used while preparing hydrogen gas in laboratory. Why ?

Temporary hardness of water can be removed by using calcium hydroxide. How ?

Why are fossils are taken as the strongest evidence obtained so far regarding the evolution of organisms ? Give reason

Which compound will form by the combination of oxygen and neon ? Also say the type of bond.

How do you prove?
##Sec^4Asec^2A = tan^4A+tan^2##

How do you factorize? ##3tan^2A+2tanA8##

How do you prove? #Sin^3A+cos^3# = #(sinA+cosA) (1SinA*cosA)#

How to find the product of #(sinAcosA)*(sin^2A+sinA*cosA+cos^2A)# ?

The radius of a circle is 21cm. An arc of the circle subtends an angle of #60@# at centre. Find the length of the arc?

If #6sinA + 8cosA# = 10 , how to prove that #TanA = 3/4# ?

Find the coordinate of the point on xaxis which is at a distance of 5 units from the point #(2,3)#?

The midpoint of the line joining (a,2) and (3,6) is (2,b). Find the values of a and b?

How to prove that : #1cos^4A/sin^4A= 1 + 2cot^2A#?

How to find the vertices of the image of #deltaPQR# having vertices #P(1, 2), Q(3, 5) & R(0, 4)# under the enlargement with scale factor 2 & centre at origin ?

The vertices of a triangle ABC are # A(6, 3) , B(3,5) & C(4,2)# . If the coordinate of P are #(x,y)# . How to prove that #PBC/ABC = x+y2/5 # ?

How to find the area of triangle whose vertices are #(3,1),(2,7) and (5,6)# ?

Find the vertices of the image of triangle #PQR# having the vertices #P(1,2) Q(3,5) and R(0,4)# under the enlargement with scale factor #2# and centre at origin?

What are three conditions required by the sun to produce enormous energy?

Which principle does hydraulic obey?

Factorise : #a^4 + a^2 b^2 + b^4#?

How to solve : # (px^24+5x)/(p^3xx^2) = 1# ?

Find the subduplicate ratio of 9:16 ?

Solve : #(3y8)/(5y2) = (y2)/(y+5)# ?

How to Solve bu using elimination method ?

How to prove ?

What amount of heat is required to raise the temperature of #30 kg# water when it is heated from #20^@ C# to #37^@ C# ?

Earthing is done only in the outer part of the electric appliances. What is the reason?

If a transformer consist of #770# turns in primary coil with #220# primary voltage produces #110# secondary voltage, then calculate the number of turns in secondary coil?

What mass of steam at #100^@ C# must be mixed with #150 g# of ice at its melting point, in a thermally insulated container to produce water of #50^@ C#?

What happens to the force of attraction when:
1. Distance is doubled
2. Masses are doubled
3. Distance is reduced by half ?

Give reason ?

Find the value ?
#sin105^@ + cos105^@#

Find the value?
#(Tan85^@  Tan25^@)/(1+Tan85^@Tan25^@)#

Prove that?
# cot 15^@ = 2+ sqrt3#

Find the value of?
#tan15^@+cot15^@#

If #tan theta = 5/6# and #tan phi= 1/11# then find #tan (theta + phi)# hence show that #(theta + phi) = (pie)/4# ?

In the given figure of hydraulic press, if the cross section area of cylinder 'A' and 'B' are #0.5 m^2# and #10 m^2# respectively, what magnitude of effort is to be applied on cylinder 'A' to balance the load of #1000N# on cylinder 'B' ?

Change into passive voice?
#># We must go into this matter.

Differentiate between alkane, alkyne, alkene and alkyl ? Give at least 3 major differences of them.