Question

1)Упростите.
sin(45град+а)+cos(45град+а)
———————————————-
sin(45град+а)-cos(45град+а).

2) Упростите:корень3 cos a-2 cos (a-30 град)+sin a.

Answer 1

1)

√2cos(a) cos(a)

... = -------------- = --------- = ctg(a)

√2sin(a) sin(a)