Qualification > Math

math in hl HELP

(1/10) > >>

sweet777:
how exactly wud u solve d identity ques in trig????????????? ???
plz give me an example and solve so dt i understand..............

sweet777:
plzzzzzzzzzzzzzzz tell me fast

astarmathsandphysics:
There are so many identity questins in trig. Do you have to prove an identity? Can you refer to a quaestion on a past paper?

sweet777:
yea...basically proving an identity....for example:
(1-sinx)/(cosx) = (cosx)/(1+sinx)

astarmathsandphysics:

--- Quote from: sweet777 on August 17, 2009, 03:51:51 pm ---yea...basically proving an identity....for example:
(1-sinx)/(cosx) = (cosx)/(1+sinx)

--- End quote ---

ok.Clear the fractions on both sides  byt multiplying by (cosx)(1+sinx)

This gives (1-sinx)(1+sinx)=(cosx)^2 then exand the left hand side to get

1-(sinx)^2=(cosx)^2 and add (sinx)^2 to both sides to get the basic identity 1=(sinx)^2+(cosx)^2

Navigation

[0] Message Index

[#] Next page