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how do i find the degree of this question? i have the answer of this question...

how do i find the degree of this question? i have the answer of this question already but need help to unerstan ityalready it says : i(t)= 0,84sin(100πt+51.3°) how do i find the 0,84 and the 51.3°?

Calculate the current I on the formula: 
i = I sin(wt + degree) .
i1 = 815 sin(100t + 65,0°) mA
i2 = 199 sin(100t - 25,0°) mA
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Answer #1

i1 is 90° ahead of i2. Hence in phaser diagram a right triangle is formed.

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