Page 104 - Bangladesh_classwiz_BOOK2018_rev_Neat

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mivmwi Øviv ¸Y K‡iI wWwMÖ †_‡K †iwWqvb ‡Kv‡Y iƒcvšÍi m¤¢e| GB gvbwU K¨vjKz‡jU‡ii †g‡gvwi‡Z msiÿY
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K‡i cÖ‡qvRbvbyhvqx †Kv‡Y iƒcvšÍi m¤¢e hv wb‡Pi w¯Œ‡b †`Lv‡bv n‡jv-

hw` Calculator wU †iwWqvb mode G _v‡K Zvn‡j GKB c×wZ Aej¤^b K‡i wWwMÖ †_‡K †iwWqvb †Kv‡Y iƒcvšÍi
Kiv hvq, hv wb‡Pi wP‡Î ‡`Lv‡bv n‡jv-

jÿYxq†h, wWm‡cø‡Z cÖ`wk©Z †QvU ‘R’ wb‡`©k Ki‡Q †h K¨vjKz‡jUiwU †iwWqvb mo d e G Av‡Q|

9.2 w·KvYwgwZK A‡f`vejxi mZ¨Zv hvPvB

ClassWiz K¨vjKz‡jUi e¨envi K‡i Lye mn‡RB w·KvYwgwZK A‡f`vejxi mZ¨Zv hvPvB Kiv hvq| D`vniY¯^iƒc,
2
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+ = 1 A‡f`wUi mZ¨Zv hvPvB Kivi Rb¨ cÖ_‡g J e¨envi K‡i Gi GKwU gvb msiÿY
Ki‡Z n‡e| K¨vjKz‡jU‡i wb‡Pi w¯Œ‡bi g‡Zv K‡i UvBc Ki‡Z n‡e| Gici = evUb Pvc‡j djvdj 1 cÖ`wk©Z
n‡e|

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jÿYxq†h, †K K¨vjKz‡jU‡i (sin( )) AvKv‡i UvBc Ki‡Z nq|
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Abyiƒcfv‡e, − = 1 A‡f`wUi Rb¨ cÖ_‡g J e¨envi K‡i Gi gvb 45 msiÿY Kiv
n‡jv| Gici wb‡Pi g‡Zv K‡i w¯Œ‡b A‡f`wUi evgcÿ cÖ‡ek Kwi‡q = evUb Pvc‡j A‡f`wUi Wvbcÿ 1 cÖ`k©b
Ki‡e|

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