ICSE − Q & A

From the top of a tower, the angles of depression of the top and bottom of a building, are observed to be 30° and 60° respectively. If the height of the building is 45 metres, find the height of the tower.
With working pls :) Thanks

For those who are students
https://www.youtube.com/watch?v=XGqWbMeMulo
For those who want to know about the marking and stuff https://www.youtube.com/watch?v=Wf1s3acq8p4

Solve the inequation:----
|   2    |
|--------| >1 ; X not = 4..
| X-4  |

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What do you'll thinkbis the most difficult part in maths? Lol

selina book pg no.236 (16c) problem no-13 can anyone explain me

cos A/1-tan A    -    sin^2 A /cos A -sin A   = cos A +sin A Plz answer

Solve the 2017 Specimen Paper .
It has good questions.

can someone explain the concept of shares and dividend

hey guys one question....i jus came across this question in one of the respapers...but nt getting the answer...can plz anyone solve it..
2xsquare +kx+19 and 6xsquare+36x+57 have common roots...find the product of values of k....i knw the procedure but i m getting negative value underoot...so plz solve dis and let me knw ur answer..!!