Latest Posts

cos [2 cos^-1 (1 / 5) + sin^-1 (1 / 5)] =

1) 2 √6 / 5 2) – 2 √6 / 5 3) 1 / 5 4) – 1 / 5... View Article

1) √5 / 3 2) 2√5 / 3 3) 4 √5 / 9 4) 2 √5 / 9 Solution: (3)... View Article

1) x – y 2) x + y 3) [x – y] / [1 + xy] 4) [x + y]... View Article

1) √3 2) 1 / √3 3) 1 – √3 4) 1 – (1 / √3) Solution: (2) 1 /... View Article

1) x + y + z – xyz = 0 2) x + y + z + xyz = 0... View Article

1) sin-1 63 / 65 2) sin-1 12 / 13 3) sin-1 65 / 68 4) sin-1 5 / 12... View Article

1) π / 2 2) π / 3 3) 0 4) None of these Solution: (4) None of these tan-1 1... View Article

1) 6 / 17 2) 17 / 6 3) 7 / 16 4) 16 / 7 Solution: (2) 17 /... View Article

1) 90o 2) 60o 3) 45o 4) tan-1 2 Solution: (4) tan-1 2 2 tan-1 (1 / 3) + tan-1... View Article

1) 1 2) 2 3) 3 4) 4 Solution: (1) 1 sin [sin-1 (1 / 3) + sec-1 3] +... View Article

1) tan-1 (27 / 11) 2) sin-1 (11 / 27) 3) cos-1 (11 / 27) 4) None of these Solution:... View Article

1) – 1 / 2 2) 1 / 2 3) 0 4) 9 / 4 Solution: (1) – 1 /... View Article

1) x / (√x2 + 2) 2) x / (√x2 + 1) 3) 1 / (√x2 + 2) 4) √(x2... View Article

1) √3 / 2 2) – √3 / 2 3) 1 / 2 4) – 1 / 2 Solution: (3)... View Article

1) 0 2) 1 3) 2 4) 3 Solution: (2) 1 Let sin-1 x = α, sin-1 y = β,... View Article

1) 1 / √5 2) – 1 / √5 3) cos 2 4) – cos 2 Solution: (4) – cos... View Article

1) cos-1 (√x / a) 2) cosec-1 (√x / a) 3) tan-1 (√x / a) 4) None of these Solution:... View Article

1) x 2) π / 2 3) 1 4) None of these Solution: (1) x Let cos-1 x = θ... View Article

1) 7π / 6 2) 5π / 6 3) π / 6 4) None of these Solution: (2) 5π /... View Article

1) 1 2) √3 3) 1 / √3 4) None of these Solution: (3) 1 / √3 tan-1 [1 –... View Article