Question

Solve this!!!!!!;!

all MCQ..
pls on copy ❤️
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Answer 1

Answer:

Step-by-step explanation:

1) sin 31π/3 = sin (30π+π)/3

                  = sin (π+π/3)

                  = sin π/3           (∵π+Ф=Ф)

                  = sin 60°

                  = √3/2

2) i⁻³⁵ = 1/i³⁵

         = 1/i⁴ˣ⁸⁺³

         = 1/i³² x i³

         = -1/i

4) 2b=a+c

SORRY I DON'T KNOW THE 3rd AND THE 4th ONES.