IIT JEE , AIEEE Forum - Mathematics , Trignometry

jain108

i m actually a medical student

please send simple trignometric identities to be used in phy and chem.

sboosy

What do u mean by trignometry in physics and chemistry?

kool.amol

some trignometric identites are used in physics:

sin^2 A+cos^2 A=1

tan^2 A=1-sec^2 A

cot^2 A=1-cosec^2 A

sin(a+b)=sinacosb+cosasinb

cos(a+b)=cosacosb-sinasina

sin(90-A)=sinA etc.....

you can take help form machnics volme 1 from DC Pandey

published by Arihant

sboosy

kool amol i suppose u didnt retain ur cool when u typed
for many are ur own identities and not definitely present in
physics or maths or chemistry
the second one should be
tan^2A=sec^2A -1
cot^2A=cosec^2A-1
cos(a+b) is cosa cosb - sina sinb
and finally sin(90-A) is cos A
pls be more careful when u type next time around

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