Question
Six persons D, E, F, G, H, and I sit in a linear row and
face in north direction. E sits second to the left of I. Only three persons sit to the right of I. H sits third to the right of G. D sits to the right of F. Who sits exactly between F and D?Solution
E sits second to the left of I. Only three persons sit to the right of I. EÂ ____Â I _____Â Â _____Â ____ H sits third to the right of G. D sits to the right of F. EÂ GÂ I FÂ Â HÂ D The final arrangement is as follows: EÂ Â Â Â Â Â Â Â GÂ Â Â Â Â Â Â Â IÂ Â Â Â Â Â Â Â Â Â FÂ Â Â Â Â Â Â Â Â HÂ Â Â Â Â Â Â Â D H sits exactly between F and D
∆ PQR is right-angled at Q. If ∠R = 60º, then find the value of cosec P.
If tan² 45°- cos² 60° x sin 45° cos 45° cot 30°, then find the value of 'x'.
The value of (3tan10°-tan³10°)/(1-3tan²10°) is equal to
- If sin (4A − B) = (√2/2) and cos (A + B) = (√2/2), where 0° < A, B < 90°, then find the value of ‘A’.
sin2 7 ° + sin2 8 ° + sin2 9 ° + sin2 10 ° + ……… + sin2 83 ° = ?
...If cos1.5B = sin(B + 5°), then find the measure of 'B'.
- If sin(A + B) = 1/2 and cos(A + 2B) = √3/2, where 0° < A, B < 90°, then find the value of tan(2A).

cos (sec-1 x) is equal to –
If A + B = 450 , then the value of 2(1 + tanA) (1 + tanB) is: