james-james_60b7d1777d4d8
james-james_60b7d1777d4d8
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vamos la sabemos que sen² x +cos² x = 1 cos² x= 1-sen²x cos² x= 1- (7/9)² cos² x= 1-49/81 cos² x= 81/81-49/81 cos²x= 32/81 cos x = V32/81 = 4V2/9 okkkkk b- tg x = sen x / cos x tg x = (7/9)/(4V2/9) tg x = 7/(4V2) = 7V2/8 okkkkk