Question
Maths
March 12, 2020, 6:46 a.m.
Answer
A plane left 30 min. Late than its scheduled time and in order to reach of destination 1500 km away in time, it had to increase its speed by 100 km / hr from the usual speed. Find usual speed
if cosec(alpha+beta)=root2 and cot(alpha-beta) is not defined, then the value of 2 beta is
QQuestions no. 7
Maths
March 11, 2020, 10:42 p.m.
Answer
The sum of n terms of three arithmetic progression are S1 ,s2 and s3 respectively. The first term of AP is 1 and their common difference is 1,2 and 3 respectively. Prove that s1 s3= 2s2
