Mathematics: Given sin(1.8)=0.97 find the value of sin(2pi+1.8)

Step-by-step explanation:We want to find the sum of We can rewrite this asThis becomes;Recall that;This implies that;Combine like terms:...

Given sin(1.8)=0.97 find the value of sin(2pi+1.8)

genyjoannerubiera

28.05.2020

y = sin(x) is periodic with T = 2pi ( it means that sin(x + 2pi) has the same value of sin(x))

Therefore sin(1.8 + 2pi) = sin(1.8) = 0.97

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riri95

15.03.2021

$4 \sqrt{2} i$

Step-by-step explanation:

We want to find the sum of

$\sqrt{ - 2} + \sqrt{ - 18}$

We can rewrite this as

$\sqrt{ 2 \times - 1} + \sqrt{ 18 \times - 1}$

This becomes;

$\sqrt{2} \times \sqrt{ - 1} + \sqrt{18} \times \sqrt{ - 1}$

Recall that;

$i = \sqrt{ - 1}$

This implies that;

$\sqrt{2} i + 3 \sqrt{2} i$

Combine like terms:

$4 \sqrt{2} i$

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