Question

(tanx+secx)(1-sinx)=cosx

Answer 1

(tan+sec) * (1-sin)
= (sin/cos +1/cos) * (1-sin)
= (sin+1)/cos * (1-sin)
= (sin+1)(1-sin)/cos
=

Answer 2

simplify the numerator,
and use sin^2+cos^2 =1,
ie sin^2 = 1-cos^2

Answer 3

@12357 are you there?

Answer 4

yes thank you so much! I understand now

Answer 5

for these trig proof, it is often best to convert all trig function to sines, and cosines first

Answer 6

ok great thanks! do you know how to solve trig equations such as
tan^2x-secx=1 where the answers should be exact

Answer 7

im not sure about this one, try closing this question and asking that question as a separate post

Answer 8

ok I will thanks!