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Value of Standard Angle(30,60,90)

What is the v...

Question

What is the value of Cosec W, if W = 90 degrees?

A

1

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B

2

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C

0.0

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D

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Solution

The correct option is A 1
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w

be the complex cube root of unity then value of

∣ ∣ ∣ ∣ ∣ \begin{matrix} 1 & w & w^{2} w & w^{2} & 1 w^{2} & 1 & w \end{matrix} ∣ ∣ ∣ ∣ ∣

(a) 0 (b) 1

(c) w (d) w^{2}

w = \frac{- 9 + 3 i}{1 - 2 i}

w (\neq 1)

is a cube root of unity, then

∣ ∣ ∣ ∣ ∣ \begin{matrix} 1 & 1 + i + w^{2} & w^{2} 1 - i & - 1 & w^{2} - 1 - i & - i + w - 1 & - 1 \end{matrix} ∣ ∣ ∣ ∣ ∣

z = - 3 + 4 i

z w = - 14 + 2 i

\frac{3}{5} w = \frac{4}{3}

, what is the value of

w

?

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