Column IColumn IIa. sin(410∘−A)cos(400∘+A)+cos(410∘−A)sin(400∘+A) p. -1b. cos21∘−cos22∘2sin3∘sin1∘ is equal toq. 1c. sin(−870∘)+cosec(−660∘)+tan(−855∘)+2cot(840∘)+cos(480∘)+sec(900∘)r. 12Which of the following is the CORRECT combination ?

Column IColumn IIa. sin(410∘−A)cos(400∘+A)+cos(410∘−A)sin(40

1.	Column IColumn IIa. sin(410∘−A)cos(400∘+A)+cos(410∘−A)sin(400∘+A) p. -1b. cos21∘−cos22∘2sin3∘sin1∘ is equal toq. 1c. sin(−870∘)+cosec(−660∘)+tan(−855∘)+2cot(840∘)+cos(480∘)+sec(900∘)r. 12Which of the following is the CORRECT combination ?
Answer» $\begin{matrix} Column I & Column II a. sin (410^{\circ} - A) cos (400^{\circ} + A) + cos (410^{\circ} - A) sin (400^{\circ} + A) & p. -1 b. \frac{{cos}^{2} 1^{\circ} - {cos}^{2} 2^{\circ}}{2 sin 3^{\circ} sin 1^{\circ}} is equal to & q. 1 c. sin (- 870^{\circ}) + cosec (- 660^{\circ}) + tan (- 855^{\circ}) + 2 cot (840^{\circ}) + cos (480^{\circ}) + sec (900^{\circ}) & r. \frac{1}{2} \end{matrix}$ Which of the following is the CORRECT combination ?