13. If sec 0 + tan 0+1=0 then (sec 0 - tan 0) = ?
(a) 1
(b) - 1
(c) 0
14. If cos A+ cos? A = 1 then (sin? A+ sin" A)= ?
(d) 2
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Step-by-step explanation:
Hence the smallest number by which 128 should be divided to make a perfect cube is 2 . Here, the prime factors 5 is not present as triples. Hence, we divide 135 by 5, so that the obtained number becomes a perfect cube. 135÷5=27=33 135 ÷ 5 = 27 = 3 3 is a perfect cube
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