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Ex. 8 : Iff is continuous at x = 1, wheref(x) = sin(x)+a,for x < 1x-1= 20for x = 11 + cos( ft x)Ti (1 - x)?+ b, for x > 1,then find the values of a and b. |
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Answer» Answer:
In △ABC AB=AC ⇒∠B=∠C (Angles opposite to equal sides are equal) Now using angle sum property ∠A+∠B+∠C=180 ∘
⇒80 ∘ +∠C+∠C=180 ∘
⇒2∠C=180 ∘ −80 ∘
⇒∠C= 2 100 ∘
=50 ∘
now ∠C+∠x=180 ∘ (Angles made on straight LINE (AC) are supplementary) ⇒50 ∘ +∠x=180 ∘
⇒∠x=180 ∘ −50 ∘ =130 ∘ @ARSH |
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