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CBSE Class 10 Answered

Q no 10
Asked by sucharitasahoo1 | 26 Nov, 2017, 10:11: AM
answered-by-expert Expert Answer
begin mathsize 16px style cos space straight A space minus space sin space straight A equals 1 now space squaring open parentheses cos space straight A space minus space sin space straight A close parentheses squared equals cos squared space straight A space plus space sin squared space straight A minus 2 cos space straight A cross times sin space straight A 1 equals 1 minus 2 cos space straight A cross times sin space straight A sin space straight A space cross times cos space straight A equals 0 open parentheses cos space straight A space plus space sin space straight A close parentheses squared equals cos squared space straight A space plus space sin squared space straight A plus 2 cos space straight A cross times sin space straight A cos space straight A space plus space sin space straight A equals plus-or-minus 1 end style
Answered by Arun | 26 Nov, 2017, 04:39: PM

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CBSE 10 - Maths
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