Delta ABC "में "angleA = 90^(@) , "तब " ...

`Delta ABC "में "angleA = 90^(@) , "तब " sin B , cos C " तथा " tan B ` के मान निम्नलिखित में प्रत्येक में बताइए ।
(a) `AB = 12, AC = 5.BC = 13" "(b) AB = 20. AC = 21, BC = 29`
(c ) `BC = sqrt2 . AB = AC = 1`

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