Show that cot^2a/1+cot^2 + tan^a/1+tan^2a = 1
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Step-by-step explanation:
cot²a/1+cot²a + tan²a/1+tan²a
=cot²a/cosec²a + tan²a/sec²a
=(cos²a/sin²a)×sin²a + (sin²a/cos²a)×cos²a
=cos²a+sin²a
=1
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