trigonometry? (1 Viewer)

[ta1g]

Can anyone help me with the harder part of the prelim 2unit trig, involving all the sin, cos , cosec, sec, tan, and all that stuff? I think its called 'trigonometric identities' but im not sure. I really need a starting point since i missed alot of the work. If any one could help me that would be great, thanks.

 

[pLuvia]

what you need to know??

 

[香港!]

Check this out, it might help you with trig. identities.
This topic all about knowing ur identities well and using algebra.

 

[klaw]

pythagorian identities?
sin²x+cos²x=1
1+tan²x=sec²x (When you divide both sides of the above equation by cos²@, just remember it by remembering a girl + a tan = sexy )
1+cot²x=cosec²x (When you divide both sides of the first equation by sec²@)

 

[RideTheLightnin]

The way we were taught was the "cosy(cosec) cot" rule and the "sexy(sec) tan" rule

maths teachers lol

 

[haack_m]

right...... that seems a little strange

lol

but it works

 

[RideTheLightnin]

sure does
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