Question

$what \: should \: be \: subtracted \: from \: \frac{ - 3}{10} \: to \: get \: \frac{ - 8}{21}$
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Answer 1

Answer:

waoooo cooollll.........

Answer 2

The trigonometric ratios sin A, sec A, and tan A can be expressed in terms of cot A as 1/√(1+ cot2A), √(1+ cot2A)/cot A and 1/cot A respectively.