Questions asked by Prashant S.
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#2(sin^6A+cos^6A)-3(sin^4A+cos^4A)=-1#?
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Solute seperates as a solid when a saturated solution is cooled. Why ?
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Concentrated sulphuric acid should not be used while preparing hydrogen gas in laboratory. Why ?
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Temporary hardness of water can be removed by using calcium hydroxide. How ?
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Why are fossils are taken as the strongest evidence obtained so far regarding the evolution of organisms ? Give reason
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Which compound will form by the combination of oxygen and neon ? Also say the type of bond.
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How do you prove?
##Sec^4A-sec^2A = tan^4A+tan^2##
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How do you factorize? ##3tan^2A+2tanA-8##
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How do you prove? #Sin^3A+cos^3# = #(sinA+cosA) (1-SinA*cosA)#
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How to find the product of #(sinA-cosA)*(sin^2A+sinA*cosA+cos^2A)# ?
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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?
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If #6sinA + 8cosA# = 10 , how to prove that #TanA = 3/4# ?
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Find the coordinate of the point on x-axis which is at a distance of 5 units from the point #(2,-3)#?
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The midpoint of the line joining (a,2) and (3,6) is (2,b). Find the values of a and b?
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How to prove that : #1-cos^4A/sin^4A= 1 + 2cot^2A#?
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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 ?
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The vertices of a triangle ABC are # A(-6, 3) , B(-3,5) & C(4,-2)# . If the co-ordinate of P are #(x,y)# . How to prove that #PBC/ABC = x+y-2/5 # ?
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How to find the area of triangle whose vertices are #(3,-1),(2,7) and (-5,6)# ?
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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?
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What are three conditions required by the sun to produce enormous energy?
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Which principle does hydraulic obey?
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Factorise : #a^4 + a^2 b^2 + b^4#?
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How to solve : # (px^2-4+5x)/(p^3x-x^2) = 1# ?
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Find the sub-duplicate ratio of 9:16 ?
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Solve : #(3y-8)/(5y-2) = (y-2)/(y+5)# ?
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How to Solve bu using elimination method ?
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How to prove ?
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What amount of heat is required to raise the temperature of #30 kg# water when it is heated from #20^@ C# to #37^@ C# ?
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Earthing is done only in the outer part of the electric appliances. What is the reason?
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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?
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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#?
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What happens to the force of attraction when:
1. Distance is doubled
2. Masses are doubled
3. Distance is reduced by half ?
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Give reason ?
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Find the value ?
#sin105^@ + cos105^@#
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Find the value?
#(Tan85^@ - Tan25^@)/(1+Tan85^@Tan25^@)#
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Prove that?
# cot 15^@ = 2+ sqrt3#
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Find the value of?
#tan15^@+cot15^@#
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If #tan theta = 5/6# and #tan phi= 1/11# then find #tan (theta + phi)# hence show that #(theta + phi) = (pie)/4# ?
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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' ?
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Change into passive voice?
#-># We must go into this matter.
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Differentiate between alkane, alkyne, alkene and alkyl ? Give at least 3 major differences of them.