If cos 9 thita
= sin thita and 9 thita < 90 then the value of tan 5 thita =??
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Answer:
cos9theta=sintheta
cos 9theta= cos (90-theta)
9theta =90-theta
9 theta + theta = 90
10 theta=90
theta=90/10 = 9
tan5theta = tan45 = 1Ans
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