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If sinA=1/root5 & sinB= 1/root10, find the values of cosA and cosB. Hence using the formula cos (A+B)=cosA .cosB- sinA.sinB, show that A+B=45

Asked by 14th September 2013, 9:16 AM
Answered by Expert
Answer:
Answered by Expert 14th September 2013, 10:12 PM
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