Question

find the value of sin 11pi/6

Answer 1

Look at the graph. Go along the x-axis until you reach 11pi/6.

Find the point on the graph, and drop a perpendicular to the y-axis.

Read off the y-axis value, and you'll find that it is (√3)/2.

Usually, though, you don't do this from a graph.

You use standard angles to do the calculation.

cos(11pi/6) = cos(-pi/6) = cos(pi/6) = (√3)/2

Standard angles: 0 (0 degrees), pi/6 (30 degrees), pi/4 (45 degrees), pi/3 (60 degrees), pi/2 (90 degrees).

Answer 2

thanks

Answer 3

You're welcome!! Xo!