Math, asked by huma2043, 7 months ago

with out using trigonometry table prove that cos81-sin9=0

Answers

Answered by Anonymous

36

Answer:

$\underline{\huge{Answer:-}}$

LHS = cos81° – sin9°

= cos(90° - 9°)- sin9°

= sin9° – sin9°

= 0 = RHS

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