Объяснение:
sin (-420°) = - 0.866025
cos (-750°) = 0.866025
tg (-405°) = - 1
2cos60°-tg π/4 = 0.986292
ctg45°-2sin π/6 = 1.98172
2cos30°·ctg60°-sin 3π/2 = 2.91784
ctg405°-ctg (-405°) : 2sin (-750°) = 0.75
Объяснение:
sin (-420°) = - 0.866025
cos (-750°) = 0.866025
tg (-405°) = - 1
2cos60°-tg π/4 = 0.986292
ctg45°-2sin π/6 = 1.98172
2cos30°·ctg60°-sin 3π/2 = 2.91784
ctg405°-ctg (-405°) : 2sin (-750°) = 0.75