Question

Find the value of sin(-330)

Answer 1

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 )

Answer 2

☺Refer the attachment☺