What is the value of 2(cos(90)+isin(90)) ?

The value of 2(cos(90)+isin(90)) is 2i

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2(cos(90)+isin(90))

2 (cos (9 0^{\circ}) + i sin (9 0^{\circ}))

2 i

Solution steps

2 (cos (9 0^{\circ}) + i sin (9 0^{\circ}))

Use the following trivial identity:

cos (9 0^{\circ}) = 0

Use the following trivial identity:

sin (9 0^{\circ}) = 1

= 2 (0 + i 1)

Simplify

= 2 i

sin (0.4 \cdot 4 \cdot π)

\frac{125}{tan ( 7 )}

7 cos (\frac{3 π}{4}) - 7 cos (\frac{π}{4})

\frac{( 7.01 ) ^{2} \cdot sin ( 2 \cdot 35 )}{15.39}

tan (arccsc (- 5))

What is the value of 2(cos(90)+isin(90)) ?
The value of 2(cos(90)+isin(90)) is 2i