14. Let 21 2(cos 20° + i sin 20°) and 22 = 5(cos 70° + i sin 70°). Find 21 22 and express your answer in the form a + bi. (a) 0 - 10i (b) 0 + 10i (c) 10+ 0i (d) −10+ 0i

Q: Q1:- Calculate sin(π/4+i)

A: Results:

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A: rewrite -5 as -5=-5+0i comparing with z=a+bi a=-5 , b=0 R=a2+b2=-52+02=25+0=25=5 now…

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A: standard form , a+ i b first part = a (real part second part = i b (imaginary part

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A: As per guidelines we have to solve one question

Q: Q 3: (Choose one) (1)Find the three cube roots of 1?

A: "Since you have posted multiple questions, we will solve first one for you. To get remaining solved…