Ответ:
1. cos t=√3
t=+-arccos√3+2πn
2. 2cos2t=√3
cos2t=√3/2
2t=+-arccos√3/2+2πn
2t=+-π/6+2πn
t=+-π/12+πn
3. cost=1/4
t=+-arccos1/4+2πn
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Ответ:
1. cos t=√3
t=+-arccos√3+2πn
2. 2cos2t=√3
cos2t=√3/2
2t=+-arccos√3/2+2πn
2t=+-π/6+2πn
t=+-π/12+πn
3. cost=1/4
t=+-arccos1/4+2πn