Math, asked by divyanshiyadav68, 5 months ago

Q10) Find the value of (
cosB+sinB)2 + ( cos B - sinB)2

Answers

Answered by xSoyaibImtiazAhmedx

2

$\huge\underline{\overline{\mid\star{\sf{\pink{Solution}}\star\mid}}}$

(cosB+sinB)2 + ( cos B - sinB)2

=cosB² + 2sinB . cosB + sinB² + cosB²-2sinB.cosB+sinB²

=2(sin²B+cos²B)

= 2×1

= 2

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