ICSE Class 10 Answered
Q9 b part
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Asked by lovemaan5500 | 26 Feb, 2018, 07:00: AM
![begin mathsize 16px style cosθ plus sinθ equals square root of 2 cosθ
Squaring space on space both space sides
cos squared straight theta plus sin squared straight theta plus 2 cosθsinθ equals 2 cos squared straight theta
sin squared straight theta minus cos squared straight theta plus 2 cosθsinθ equals 0
minus sin squared straight theta plus cos squared straight theta minus 2 cosθsinθ equals 0
2 sin squared straight theta minus sin squared straight theta plus cos squared straight theta minus 2 cosθsinθ equals 2 sin squared straight theta space space space space Adding space 2 sin squared straight theta space on space both space sides
sin squared straight theta plus cos squared straight theta minus 2 cosθsinθ equals 2 sin squared straight theta
open parentheses cosθ minus sinθ close parentheses squared equals 2 sin squared straight theta
cosθ minus sinθ equals square root of 2 sinθ
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Answered by Sneha shidid | 26 Feb, 2018, 10:19: AM
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