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If 0 lt lt theta lt pi/4, 2 y cos thet...

If 0 lt lt theta lt pi/4, 2 y cos theta=x sin theta` and `2 x sec theta+y cosec theta=5` , then value of `x^2+4 y^2` is

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CENGAGE-TRIGNOMETRIC RATIOS IDENTITIES AND TRIGNOMETRIC EQUATIONS-Question Bank
  1. Number of ordered pairs (x, y) satisfying the equation 4 y^2+2 cos ...

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  2. If alpha, beta in(0, pi/2) satisfy the following simultaneous equ...

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  3. Number of solutions of the equation tan 2 theta=tan 6 theta in (0,3 pi...

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  4. The least value of ' a ' for which the equation 2 sqrta sin ^2 x+sqrta...

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  5. The number of solution (s) of the equation sqrt2+cos 2 x=(sin x+cos...

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  8. The numbers of solution (s) of the equation (1-1/2 sin x) cos ^2 2 x=2...

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  9. If 2 sin x=1-2 cos x, then value of |tan x+(1)/(tan x)| is

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  10. The number of pairs of integer (x, y) that satisfy the following two '...

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  11. If (cos theta)^6+(sin theta)^6 = a0+a1 cos 4 theta and a0 a1=m/n ...

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  12. If (sin alpha)/(sin beta)=(cos gamma)/(cos delta), then (sin ((alp...

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  13. If 0 lt lt theta lt pi/4, 2 y cos theta=x sin theta and 2 x sec t...

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  15. For x in[0,3 pi], the number of integral values of x satisfying ...

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  17. The number of solution (s) of cos sqrt3 x+cos sqrt5 x=2 is

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  18. Number of ordered pairs (x, y) which satisfies the relation x^4+1/8 ...

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  19. If 28 sin ^4 alpha+21 cos ^4 alpha=12 then value of 24(tan ^2 alph...

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  20. The value of the expression (cosec 50^(circ)+sqrt3 sec 50^(circ)) is...

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