Which of the following is possible? `costheta=pi/3`

Which of the following is possible? cos theta=(pi)/(3)

Which of the following is/are possible values of radius of stable orbit of hydrogen atom ? (a) lambda/(2pi) , (b) (3lambda)/(4pi) , (c ) lambda/pi , (d) (5lambda)/(4pi)

Which of the following is/are possible values of radius of stable orbit of hydrogen atom ? (a) lambda/(2pi) , (b) (3lambda)/(4pi) , (c ) lambda/pi , (d) (5lambda)/(4pi)

If sin^2theta_1+sin^2theta_2+sin^2theta_3=0, then which of the following is not the possible value of costheta_1+costheta_2+costheta_3? (a) 3 (b) -3 (c) -1 (d) -2

If sin^2theta_1+sin^2theta_2+sin^2theta_3=0, then which of the following is not the possible value of costheta_1+costheta_2+costheta_3? 3 (b) -3 (c) -1 (d) -2

If sin^2theta_1+sin^2theta_2+sin^2theta_3=0, then which of the following is not the possible value of costheta_1+costheta_2+costheta_3? (a) 3 (b) -3 (c) -1 (d) -2

If sin^2theta_1+sin^2theta_2+sin^2theta_3=0, then which of the following is not the possible value of costheta_1+costheta_2+costheta_3? (a) 3 (b) -3 (c) -1 (d) -2

Which of the following statement(s) is/are possible? 2sin^(2)theta=log_(e)pi+log_(pi)e

Find the maximum and minimum values of the following expressions. (i) 3costheta+5sin(theta-pi/6) (ii) 4sintheta-3costheta+7

If (1+ sintheta-costheta)/(1+ sintheta + costheta)+(1+sintheta+costheta)/(1+sintheta-costheta)= 4 , then which of the following values will be suitable for theta ?