Question

give the formula about trigonometry

Answer 1

sin =p/h
cos =b/h
tan =p/b
cosec=h/p

Answer 2

sinФ =1/cosecФ          cosecФ =1/sinФ 
cosФ =1/secФ             secФ = 1/cosФ
tanФ =1/cotФ              cotФ =1/tanФ

Some Identities are as below :

1. sin²Ф + cos²Ф = 1
2. 1 + tan²Ф = sec²Ф
3. 1+ cosec²Ф = cot²Ф

and there is a relation between tan and sin , cos i.e.

 tanФ = sinФ/cosФ          cotФ = cosФ /sinФ

these formulae ara most important .
  
Hope it helps......plz mark it as brainliest answer...