
Grade 1010 grade maths
if x=asecΘ+btanΘ and y=atanΘ+bsecΘ, then prove that x2-y2=a2-b2.
if x=asecΘ+btanΘ and y=atanΘ+bsecΘ, then prove that x2-y2=a2-b2.


Why is Axiom 5, in the list of Euclid’s axioms, considered a ‘universal truth’? (Note that the equation is not about the fifth postulate.)
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The smallest composite number is ______.
(a) 2
(b) 4
(c) 1
(d) None of these
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Find the arithmetic mean of the first ten odd natural numbers.
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