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If A and B are complementary angles, then the value of `(sin^(2)A + sin^(2)B)/("cosec"^(2)A-tan^(2)B)` is ________

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If A and B are complementary angles, then the value of `(sin^(2)A + sin^(2)B)/("cosec"^(2)A-tan^(2)B)` is ________
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(i) `sin^(2)A=sin^(2)(90-B)`. If A and B complementary angles.
(ii) If `A+B=90^(@)`, then ` sin A = cos B and tan B= cot A`.
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