If sin (thetA) = 0.3, find sin (theta+pi)

Additional formula:

sin (theta + π) = sin (theta) · cos π + cos (theta) · sin π =

= 0.3 · ( - 1) + cos (theta) · 0 = - 0.3

To solve this question, first find the value of theta.

Sin (theta) = 0.3

Theta = sin^-1 (0.3)

Theta = 17. 457 degrees.

Pi = 180 degrees.

Sin (17.457+180) = sin (197.457) = - 0.3.