1. 1. sin 167, 2. cos215,3. tg 135, 4. ctg240

2.
1. 2sin30 - tg45 + 2ctg45 + cos90

3.
1. sin750, 2. cos1125, 3. tg570, 4. ctg3660

4.
1. sin(a+b) + sin(a-b)/sin(a+b) - sin(a-b)

5.
1. sin x = 1/2, 2. cos x = -1/2, 3. tg x = -

skidan2002    3   23.11.2020 21:05    17