if sin=3/4 and tan=9/2,then cos=?
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cosA =1/2 =cos 60
cos 4A =cos 4×60=240
cos240 =0.325718
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➡Given here :-
➡ Sin X = 3/4
➡ Tan X = 9/2
[ we know ]
Cosx = √ ( 1- sin²x )
= √[ 1- (3/4)2]
= √(1- 9/16)
= √(16-9)/16
= √(7/16)
= √7/4.
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