Try this solution (note, this is not the only way):
Q1: if sin(x- 3pi/2)=-sin(3pi/2- x)=--cosx=cosx, then sin(x- 3pi/2)=cosx and sin(x- 3pi/2)=<u>7/25</u>.
Q2: if tan(x)=√3 and x∈(180°;270°), then x=arctan√3+180°=60+180=240°.
If x=240°, then sin(x-210°)=sin30°=<u>0.5</u>.
Answer:
6377828
Step-by-step explanation:
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(3 + 4i)(4 - 3i)
3(4 - 3i) + 4i(4 - 3i)
3(4) - 3(3i) + 4i(4) - 4i(3i)
12 - 9i + 16i - 12i^2
12 + 7i - 12(-1)
12 + 7i + 12
12 + 12 + 7i
24 + 7i
Answer:The solution is in the attached file
Step-by-step explanation: