((4 pi)/(5))^(c)

Which of the following quantities are rational? (a) sin((11pi)/(12))sin((5pi)/(12)) (b) cos e c((9pi)/(10))sec((4pi)/5) (c) sin^4(pi/8)+cos^4(pi/8) (d) (1+cos((2pi)/9))(1+cos((4pi)/9))(1+cos((8pi)/9))

Which of the following quantities are rational? (a) sin((11pi)/(12))sin((5pi)/(12)) (b) cos e c((9pi)/(10))sec((4pi)/5) (c) sin^4(pi/8)+cos^4(pi/8) (d) (1+cos((2pi)/9))(1+cos((4pi)/9))(1+cos((8pi)/9))

Which of the following quantities are rational? (a) sin((11pi)/(12))sin((5pi)/(12)) (b) cos e c((9pi)/(10))sec((4pi)/5) (c) sin^4(pi/8)+cos^4(pi/8) (d) (1+cos(2pi)/9)(1+cos(4pi)/9)(1+cos(8pi)/9)

Which one of the following number is largest in value? (A) tan((5 pi)/(4))(B)sin^(2)((5 pi)/(4))(C)log_(2)((5 pi)/(4))(D)ln((5 pi)/(4))

Express each of the following angles in degrees. (i) ((5pi)/12)^(c ) , (ii) - ((18pi)/5)^(c ) , (iii) (5/6)^(c ) , (iv) -4^(c )

The value of int_((pi)/(6))^((pi)/(4))(dx)/(sin2x*(tan^(5)x+cot^(5)x)) is (A) (pi)/(40)(B)(pi)/(60)(C)(pi)/(120) (D) (pi)/(20)

Find the value tan((pi)/(5))+2tan((2 pi)/(5))+4cot((4 pi)/(5))

sin ((pi) / (5)) sin ((2 pi) / (5)) sin ((3 pi) / (5)) sin ((4 pi) / (5)) =

If the tangent at the point P(theta) to the ellipse 16x^(2)+11y^(2)=256 is also a tangent to the circle x^(2)+y^(2)-2x=15, then theta=(2 pi)/(3)( b )(4 pi)/(3) (c) (5 pi)/(3) (d) (pi)/(3)

In which of the following sets the inequality sin^(6)x+cos^(6)x>(5)/(8) holds good? (a) (-(pi)/(3),(pi)/(8))( b) ((3 pi)/(8),(5 pi)/(8))( c) ((pi)/(4),(3 pi)/(4)) (d) ((7 pi)/(8),(9 pi)/(8))