Page 103 - Bangladesh_classwiz_BOOK2018_rev_Neat

‡Kv‡Yi cwigvY-Gi ci eÜbx e¨envi Kiv fvj, hw`I K¨vjKz‡jUi GwU QvovB mwVKfv‡e djvdj cÖ`v‡b mÿg|

w·KvYwgwZK Abycv‡Zi Calculation Kivi Rb¨ ClassWiz- G j, k I l GB wZbwU evUb i‡q‡Q|
1 1 1
ZvB sec, cosec I cot Gi calculation Gi Rb¨ , I e¨envi Ki‡Z n‡e|

ClassWiz K¨vjKz‡jUi wKQz wKQz w·KvYwgwZK Abycv‡Zi gvb mivmwi fMœvsk AvKv‡i cÖKv‡k mÿg| wb‡P Ggb
wZbwU gvb †`Lv‡bv n‡jv-

ClassWiz K¨vjKz‡jU‡ii GB ˆewkó¨wU, Kxfv‡e w·KvYwgwZK AbycvZ¸‡jvi gv‡bi cybive„wË N‡U Zv wbixÿv
Ki‡Z mvnvh¨ K‡i| D`vniY¯^iƒc, Kxfv‡e cÖwZ 360° †Kv‡Yi e¨eav‡b cosine dvsk‡bi gv‡bi cybive„wË N‡U
Zv wb‡Pi w¯Œ‡b †`Lv‡bv n‡jv-

‡iwWqvb GK‡K w·KvYwgwZK Calculation Kivi Rb¨ SET UP e¨envi K‡i Angle unit, radian-G wb‡Z
n‡e| K¨vjKz‡jU‡i w¯Œ‡bi Dc‡i †QvU K‡i ‘R’ cÖ`wk©Z n‡e| wb‡Pi w¯Œ‡bi w`‡K jÿ¨ Ki‡j †`Lv hvq †h, †h‡nZz
cÖ_g w¯Œ‡b †QvU K‡i ‘R’ cÖ`wk©Z n‡q‡Q, ZvB cÖvß djvdjwU mwVK| wØZxq w¯Œ‡b 60° Gi gvb †ei Kivi

Rb¨ T2 evUb e¨envi K‡i wWwMÖ wPý †`Iqv n‡q‡Q hv †iwWqvb †mwUsm‡K AvcvZfv‡e cÖwZ¯’vwcZ K‡i|
Z…Zxq w¯Œ‡b †`Lv hv‡”Q, K¨vjKz‡jUi †Kv‡Yi cwigvc †iwWqv‡b Ki‡Q, †Kbbv Angle Unit, radian- G Av‡Q|
d‡j GwU 60 †iwWqvb †Kv‡Yi Gi gvb cÖ`k©b Ki‡Q|

K¨vjKz‡jU‡ii Angle unit, degree-‡Z _vKv Ae¯’vq ‡Kv‡bv †Kv‡Yi cwigvc wWwMÖ †_‡K †iwWqv‡b iƒcvšÍi Kiv
m¤¢e| GRb¨ cÖ_‡g †h †KvYwU‡K iƒcvšÍi Ki‡Z n‡e Zv cÖ‡ek Kiv‡Z n‡e| Gici T2 evUb †P‡c Angle

unit ‡e‡Q wb‡Z n‡e| †iwWqvb wbe©vP‡bi Rb¨ 2 Pvc‡Z n‡e| Gici = evUb Pvc‡j djvdj wWwMÖ‡Z cvIqv
hv‡e| x evUb e¨envi K‡i cÖvß `kwgK djvdj‡K wWwMÖ , wgwbU, †m‡K‡Û cvIqv hv‡e, hv wb‡P †`Lv‡bv n‡jv-

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