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If u=sqrt(a^2 cos^2 theta + b^2sin^2thet...

If `u=sqrt(a^2 cos^2 theta + b^2sin^2theta)+sqrt(a^2 sin^2 theta + b^2 cos^2 theta),` then the difference between the maximum and minimum values of `u^2` is given by : (a) `(a-b)^2` (b) `2sqrt(a^2+b^2)` (c) `(a+b)^2` (d) `2(a^2+b^2)`

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ALLEN-TRIGONOMETRIC RATIOS AND IDENTITIES-All Questions
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  2. If s e c^2theta=(4x y)/((x+y)^2) is true if and only if (a)x+y!=0 (b)...

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  6. Let cos(alpha+beta)""=4/5 and let sin (alpha+beta)""=5/(13) where 0lt=...

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  11. Let fk(x)=1/k(sin^kx+cos^kx)" where "x in R and kge1. " Then "f4(x) -f...

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  15. Given both thetaa n dvarphi are acute angles and sinalphabetagamma=1/2...

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  19. For 0ltthetalt pi/2 the solutions(s) of sum(m=1)^6 cosec (theta+ ((m-1...

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