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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

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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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