How can we convert question 15 into vector method of 11.2
Question
Maths
Jan. 31, 2019, 9:39 p.m.
Answer
If the angle of elevation of a cloud from from a point h meter above a lake is alpha and the angle of depression of its reflection in the lake be beta , prove that the distance of the cloud from the point of observation is:
2h sec alpha
=------------------------------
Tan beta - tan alpha
2h sec alpha
=------------------------------
Tan beta - tan alpha
Maths
Jan. 31, 2019, 8:39 p.m.
Answer
In 1st question of ex 10.4, 10th chapter of 9th class that is 'circles', the sollution given in this app is totally wrong. Please see to it as.
How many 3 digit Even Numbers can be formed by the digits 123456 if the digits can be repeated?
Any three digit number can be formed from the digits 1, 2, 3, 4 and 5 assuming that reputation of the digit is allowed
itana bada hai tu isa acha mai bata ta hu
- a=3, d=5, l=253
- 20 th term from end = L - ( N-1)D
- = 253-9×5
- =158
A committe of seven has to be formed from nine boys and four girls how many ways can this be done when committe consist of atmost 3girls
The area of the quadrilateral whose vertices taken in order are (–4, –2), (–3, –5), (3, –2) and (2, 3) is
Maths
Jan. 31, 2019, 8:25 p.m.
Answer
A committe of 7has to be formed from 9boys 4girls in how many way can this be done when committe consist of at most 3 girl