Question

This question really confuses me... please, i need help!

Answer 1

csc a + sec a / sin a + cos a

= 1/sin a + 1 /cos a
----------------
sin a + cos a

= cos a + sin a 1
----------- * ------
sin a + cos a
sin a cos a

= 1 / sin a cos a

Answer 2

- thats not one of options!!!???

Answer 3

maybe (b) is wrong?

Answer 4

i'm certain that the above is correct

Answer 5

1 + tan^2 a = 1 + sin^2a/ cos^2 a
--------- -----------------
sin a / cos a
tan a


= 1 cos a 1
--- * ------- = ----
cos^a sin a sin a cos a

which is same answer as in last post

so correct option is 1 + tan^2 a
---------
tan a


Option c

Answer 6

there might be an easier way to do this!!!
but i'm sure this is a correct way

Answer 7

u sill there?

Answer 8

yes! sorry i was taking a break...headache. I really appreciate you putting so much effort into this. I'll take a look at it now!

Answer 9

so i see you use the reciprocal identities..

Answer 10

yes - change every ratio into sines and cosines
and obtained 1/sin a cos a from the original expression and from option (c)

its like if a = c and b = c then a must be = b

these trig identities can be tricky but changing everything to sines and cosines often works

Answer 11

i know - they can gives you headaches!!

Answer 12

yes they are tricky. I'm usually good at math but my teacher is never helping so i'm so lost!! i still have 2 questions left that i cannot solve.

Answer 13

and they involve these identities. So thank you for helping me out!

Answer 14

no probs - must go now - its late here in uk - 1:20 am
good luck!

Answer 15

alright bye!