Q43 of 51 Page 54

If A + B = 90 then prove tha .

Formula: -


(i) cot(90 - a) = tana


(i) sina.coseca = 1


(iii) sin(90° – a) = cosa


LHS.


we know that, A + B = 90°⇒ B = A – 90°







L.H.S = R.H.S


Hence, Proved.


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