CBSE Class 11-science Answered
if tan69 + tan66 - tan69.tan66=2k then find value of k
Asked by | 01 Sep, 2012, 10:28: AM
Expert Answer
69+66=135
apply "tan" on both sides
tan(69+66)=tan135
tan69+tan66/1-tan69tan66= -1
tan69+tan66 = -1+tan69tan66
=> tan69 + tan66-tan69tan66 = -1
=> k= -1/2
Answered by | 02 Sep, 2012, 11:46: AM
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