1.

*03. Ifnis an integer then show that /(1+cos 0+isin )"+(1+cos O-isin o)2 /►Mar10)​

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

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⇒2∠C=180

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−80

∘

⇒∠C=

2

100

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=50

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now ∠C+∠x=180

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(Angles made on STRAIGHT LINE (AC) are supplementary)

⇒50

∘

+∠x=180

∘

⇒∠x=180

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−50

∘

=130

∘

@ARSH

[email PROTECTED]_arsh_deep_29


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