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If sec theta = (2xy)/(x^2+y^2) possible?...

If `sec theta = (2xy)/(x^2+y^2)` possible? When x and y are positive real numbers.

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UNITED BOOK HOUSE-HOWRAH ZILLA SCHOOL-EXERCISE
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  9. Geometrically find the value of sqrt(38) (only traces of construction ...

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  10. If sec theta+ tan theta = 2+sqrt5, show that sin theta+ cos theta = 3/...

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  11. If alpha and beta are complementary angles to each other, the find the...

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  12. If sec theta = (2xy)/(x^2+y^2) possible? When x and y are positive rea...

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