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 Sep, 2013, 09:16: AM

Expert Answer:

Answered by  | 14th Sep, 2013, 10:12: PM

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