Trig on DAT

Started by hoabangkhuang
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hoabangkhuang

Junior Member
10+ Year Member
15+ Year Member
hi guys,

Are we required to know Double Angle Formulas, Half Angle Formulas, and sum and differences for sin, cos, tan? Isn't that too much?

Do we have to know this...

Cos2x= cos^2 x - sin^2 x
= 2cos^2 -1
= 1- 2sin^2 x

All those good stuffs 🙄 ... Thanks...
 
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