If `P_n = cos^n theta + sin^n theta and Q_n = cos^n theta - sin^n theta,` then which of the following is/are true.

If quad P_(n)=cos^(n)theta+sin^(n)theta and Q_(n)=cos^(n)theta-sin^(n)theta then which of the following is/are true.

(cos theta + i sin theta) ^ (n) = cos n theta + i sin n theta

cos m theta-sin n theta=0

If sin theta + cos theta = m and sin ^(3) theta + cos ^(3) theta =n, state which of the following is true-

If P_n = cos^n theta+ sin^n theta then 2P_6-3P_4 + 1 =

If P_n = cos^n theta+ sin^n theta then 2P_6-3P_4 + 1 =

If cos m theta = sin n theta , then theta =

cos m theta=sin n theta then theta=

If sin theta + costheta = m and sin theta - cos theta = n , then

If sin theta + costheta = m and sin theta - cos theta = n , then