Question

HOW SIN (1830)=SIN(30)​

Answer 1

sin(1830) =sin (30)

because we know that at the

180°and 360° (π &2π) the

sine and cosine functions does not changes

so

LET

L.H.S.

sin(1830) => sin (360x5+30)

or

sin(10π+π/6)

=sin(30)

because the function will remain same on the multiple of 180° & 360°

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