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Question

The value of sin[2tan1(0.75)] is 

(a) 0.75        (b) 1.5        (c) 0.96        (d) sin 1.5


Solution

(c) We have sin[2 tan1(0.75)]=sin(2 tan134)           [ 0.75=75100=34]=sin[sin12.341+916]=sin[sin13/225/16]=sin[sin1(4850)]=sin[sin1(2425)]=2425=0.96

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