Proving Trigonometry identies??

Starting from identity

prove that

How to prove this with the right steps in proving any identity

wah your formula skill is champion

u ish mean sign sguare tither pruss cosign sguare tither equalsi wan?

ah i remember liaoz just divide all by cosign sguare

Starting from sin² Φ + cos² Φ = 1

Prove that sec² Φ = 1 + tan² Φ

This is a standard O levels question

Divide throughout by cos² Φ and you will get the answer

aiyoh, eagle u also know that first equation cannot have solution like that

eagle: how do you type sin² Φ + cos² Φ = 1 here?

eagle: how do you type sin² Φ + cos² Φ = 1 here?

start => run => charmap

choose there, or simply type phi in the advanced search