Find the value of sin(-330)
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Step-by-step explanation:
Sin (-330) = - Sin 330
= - Sin (360 - 30)
= - ( Sin 360 × Cos 30 - Cos 360 × Sin 30 )
= - ((0 × √3 ÷ 2) -( 1 × 1/2) )
=- ( 0 - 1/2 )
= - ( - 1/2)
= + 1/2 ( ANS. ).
Formulas used are :
Sin (- X ) = - Sin X
Sin ( A - B ) = (Sin A × Cos B) - (Cos A × Sin B )
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