`((pi)/(4))+((2 pi)/(3))-((pi)/(6))`

1+sinx + sin^2(x) + .... = 4+2sqrt3, 0ltxltpi, x!=pi, then x = 1) (pi)/(3), (pi)/(4) 2) (pi)/(4), (pi)/(6) 3) (2 pi)/(5), (pi)/(6) 4) (pi)/(3), (2 pi)/(3)

The function f(x)=tan^(-1)(sin x+cos x) is an increasing function in (1)((pi)/(4),(pi)/(2))(2)(-(pi)/(2),(pi)/(4))(3)(0,(pi)/(2))(4)(-(pi)/(2),(pi)/(2))^(((pi)/(4)),(pi)/(2))^(((pi)/(4)))(2)

int_((5)/(2))^(5)(sqrt((25-x^(2))^(3)))/(x^(4))dx is equal to (a) (pi)/(6)(b)(2 pi)/(3)(5 pi)/(6) (d) (pi)/(3)

The value of cos^(-1)sqrt((2)/(3))-cos^(-1)((sqrt(6)+1)/(2sqrt(3))) is equal to (A)(pi)/(3)(B)(pi)/(4)(C)(pi)/(2)(D)(pi)/(6)])

If 4cos^(2)theta=3 then theta =---- 1) (pi)/(6),(5 pi)/(6) 2) (pi)/(4),(3 pi)/(4) 3) (pi)/(3),(2 pi)/(3) 4) +-(pi)/(2)

The angle between the circles x^(2)+y^(2)-4x-6y-3=0 x^(2)+y^(2)+8x-4y+11=0 , 1.)(pi)/(2) 2.) (pi)/(4) 3.) (pi)/(6) 4.)(pi)/(6)

(pi)/(4)-(3 pi)/(4)-(pi)/(6)+(pi)/(4)=

The solution of 4sin^(2)x+tan^(2)x+csc^(2)x+cot^(2)x-6=0 is (n in Z)n pi+-(pi)/(4)(b)2n pi+-(pi)/(4)n pi+(pi)/(3)(d)n pi-(pi)/(6)

The principal solution of the trigonometric equation sqrt(3)sec theta+2=0 is 1. (pi)/(6) 2. (2 pi)/(3) 3. (pi)/(6) 4. (5pi)/6

If roots of the equation 2x^(2)-4x+2sin theta-1=0 are of opposite sign,then theta belongs to ((pi)/(6),(5 pi)/(6))(b)(0,(pi)/(6))uu((5 pi)/(6),pi)((13 pi)/(6),(17 pi)/(6))(d)(0,pi)