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Trigonometry

Help please.
2(sec x-1)=tan x, and x is not a multiple of pie/2, prove that tan (x/2) = 1/2 and deduce the values of sin x and cos x.

Ans: sin x = 4/5 cos x = 3/5

Reply 1

TSR Jessica

Sorry you've not had any responses about this. :frown:

Are you sure you’ve posted in the right place? Posting in the specific Study Help forum should help get responses. :redface:

I'm going to quote in Tank Girl now so she can move your thread to the right place if it's needed. :h:

Spoiler

Reply 2

davros

Original post by Zoshii

Help please.
2(sec x-1)=tan x, and x is not a multiple of pie/2, prove that tan (x/2) = 1/2 and deduce the values of sin x and cos x.

Ans: sin x = 4/5 cos x = 3/5