Math, asked by qazwsxedcr6718, 9 months ago

If sin 49 = 0.75 then the value of cos ( - 581 )

Answers

Answered by rajeevr06
1

Answer:

 \cos( - 581)  =  \cos(581)  =  \cos(360 + 221)  =  \cos(221)  =  \cos(270 - 49)  =  -  \sin(49)  =  - 0.75

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