Question

sin 25 degree cos 65 degree + cos 25 degrees sin 65 degree

Answer 1

Check the pic for solution and sorry for the bad handwriting...

Answer 2

sin25° . cos65° + cos25° . sin65°

sin25° . cos(90°-65°) + cos25° . sin(90°-65°)

sin25° . sin25° + cos25° . cos25°

sin²25° + cos²25°

1                                     (∴ sin²Q+cos²Q=1)