Ex 3.2, 9 - Find value of sin -11pi/3 - Chapter 3 - Finding Value of trignometric functions, given angle

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Ex 3.2,9 Find the value of the trigonometric function sin ( – 11"π" /3) sin ((−11 𝜋)/3) = – sin ((11 𝜋)/3) = – sin ("3 " 2/3 " π" ) = – sin ( 4π – 1/3 π ) = – sin ((− 1)/3 " π" ) = – ("– sin " (1/3 " π" )) = sin (1/3 " π" ) = sin 60° = √3/2

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