Math, asked by tanyasaraf55, 1 month ago

plz answer the above question fast

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Answered by anugulamahalaxmi

1

LHS = cos (81 ° + θ)

= cos [90 ° - (9 ° -θ)]

= sin (9 ° -θ)

= RHS.

Therefore, cos (81 ° + θ) = sin (9 ° -θ).

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