Question

sin^2x +sin^2(x+Pie/3)+sin^2(x-pie/3)=(2/3)^-1​

Answer 1

Sine and cosine ......are fully cations revealing the shape of a right triangle .Looking out from a vertex with angle ..site. is the ratio of he opposite side of the hypotenuse while cos is the ration of the adjacent side to the hypotension