Find `240^( @ )` in radian

( a ) `( 4pi )/3`
( b )`( 3pi )/4`
( c ) `( 4pi )/3`
( d ) `( 3pi )/4`

The possible values of theta in (0, pi) such that sin (theta) + sin (4 theta) + sin (7 theta) = 0 are (1) (2 pi) / (9), (i) / (4 ), (4 pi) / (9), (pi) / (2), (3 pi) / (4), (8 pi) / (9) (2) (pi) / (4), (5 pi ) / (12), (pi) / (2), (2 pi) / (3), (3 pi) / (4), (8 pi) / (9) (3) (2 pi) / (9 pi) ), (pi) / (4), (pi) / (2), (2 pi) / (3), (3 pi) / (4), (35 pi) / (36) (4) (2 pi ) / (9), (pi) / (4), (pi) / (2), (2 pi) / (3), (3 pi) / (4), (8 pi) / (9)

The principal value of sin^(-1)(sin((2 pi)/(3))) is (a)-(2 pi)/(3) (b) (2 pi)/(3) (c) (4 pi)/(3) (d) (5 pi)/(3) (e) none of these

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

For f(x)=sin^2x ,x in (0,pi) point of inflection is: pi/6 (b) (2pi)/4 (c) (3pi)/4 (d) (4pi)/3

IF the lengths of the side of triangle are 3,5A N D7, then the largest angle of the triangle is pi/2 (b) (5pi)/6 (c) (2pi)/3 (d) (3pi)/4

(tan) (11 pi) / (3) (- 2sin) (4 pi) / (6) - (3) / (4) (cos ec ^ (2)) (pi) / (4) + (4cos ^ (2)) (17 pi) / (6) = (3-4sqrt (3)) / (2)

If f(x)={(-1, if x 0)) and g(x) =sinx+ cos x, then points of discontinuity of (fog)(x) in (0,2pi) are (A) pi/4,(5pi)/4 (B) pi/4,(3pi)/4 (C) pi/4,(7pi)/4 (D) (3pi)/4,(7pi)/4

(sin (- (11 pi) / (3)) * sec (- (7 pi) / (3))) / (cot ((5 pi) / (4)) csc ((7 pi) / (4) )) =

In a right angled triangle the hypotenuse is 2sqrt(2) xx the perpendicular drawn from the opposite vertex.Then the other acute angles of the triangle are (a) (pi)/(3)and(pi)/(6) (b) (pi)/(8)and(3 pi)/(8) (c) (pi)/(4) and (pi)/(4) (d) (pi)/(5) and (3 pi)/(10)