(-3)/(5)" and "sin beta=(7)/(25)," where "(pi)/(2)

If tan alpha=(5)/(2),tan beta=-(7)/(9) where alpha in[(pi)/(2),pi], then alpha+beta lies in the interval.[(3 pi)/(2),(7 pi)/(3)] (b) [(13 pi)/(6),(5 pi)/(2)][(13 pi)/(6),(7 pi)/(3)] (d) [(pi)/(6),(pi)/(3)]

If tan alpha=(1)/(7) and sin beta=(1)/(sqrt(10)), where 0

If 0

If cot alpha=(1)/(2),sec beta=-(5)/(3), where pi

Let cos(alpha+beta)=(4)/(5) and let sin(alpha-beta)=(5)/(13), where 0<=alpha,beta<=(pi)/(4) Then tan2 alpha=(36)/(33) b.(19)/(12) c.(20)/(7)d*(25)/(16)

Let cos(alpha+beta)=(4)/(5) and let sin (alpha-beta)=(5)/(13) where 0<=alpha,beta<=(pi)/(4). Then tan2 alpha=(56)/(33)(b)(19)/(12)(c)(20)/(7) (d) (25)/(16)

If sin alpha=(3)/(5),tan beta=(1)/(2) and (pi)/(2)