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Choose the correct answer in each of the following questions: `sin(45^(@)+theta)-cos(45^(@)-theta)=?`

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Choose the correct answer in each of the following questions:
`sin(45^(@)+theta)-cos(45^(@)-theta)=?`
A. `2 sin theta`
B. `2 cos theta`
C. 0
D. 1
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1 Answer

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Best answer
Correct Answer - C
`sin(45^(@)+theta)-cos(45^(@)-theta)=sin(45^(@)+theta)-sin{90^(@)-(45^(@)-theta)}`
`=sin(45^(@)+theta)-sin(45^(@)+theta)=0.`
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