Math, asked by savitajaiswar6674, 9 months ago

सीमाओं के मान प्राप्त कीजिए : \lim_{x\rightarrow0}\dfrac{\cos 2x - 1}{\cos x - 1}

Answers

Answered by amitnrw
0

4   \lim_{x\rightarrow0}\dfrac{\cos 2x - 1}{\cos x - 1} = 4

Step-by-step explanation:

\lim_{x\rightarrow0}\dfrac{\cos 2x - 1}{\cos x - 1}

x = 0  प्रयोग करने पर  

= (Cos(2*0) - 1 )/(Cos0 - 1)

= (1 - 1)/(1 - 1)

= 0/0

परिभाषित नहीं

(Cos2x - 1)/(cosx - 1)

= ( Cos²x - Sin²x - 1)/(Cosx - 1)

= (Cos²x - (1 - Cos²x) - 1)/(Cosx - 1)

= (2Cos²x - 2)/(Cosx - 1)

= 2(Cos²x - 1)/(Cosx - 1)

= 2(Cosx + 1)(Cosx - 1)/(Cosx - 1)

= 2(Cosx + 1)

x = 0  प्रयोग करने पर  

= 2(Cos(0) + 1)

= 2(1 + 1)

= 2 (2)

= 4

\lim_{x\rightarrow0}\dfrac{\cos 2x - 1}{\cos x - 1} = 4

और पढ़ें

सीमाओं के मान प्राप्त कीजिए :  [tex]\lim_{x\rightarrow3}\dfrac{x^4 - 81

brainly.in/question/15778085

सीमाओं के मान प्राप्त कीजिए

brainly.in/question/15778083

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