I'm assuming that you're asked to verify the identities you've been given...Hello , I'm Joshua. This is my first time here and my first post. I came from Philippines and I am studying at Computer College University. My course is B.S. Computer Engineering. A freshman. I came here because, I think it might help me.

Okay here's my problem.

When I was at highschool, math are too easy for me. Specially, Highschool Algebra, Trigo's. But then after I entered the college life. I cant understand ALL math subjects, there are too numbers for me to put it in my brain. We have two math subjects, first is College Algebra, and the second is Trigonometry. I failed them both at Prelim . And this MidTerm I was hoping I could pass it. But after the MidTerm examination I failed it again. I cant believe that this is happening to me. Every night, I am almost crying, because I cant take it anymore. It is really hard.

I felt stupid, pathetic. Even how many times it is discussed I cant understand it.

Please... Help me! I NEED to advance to second year, well... not just second year but to Graduate also! I love my mother, she's the only one who pay my tuition fees, and all payments for school. Im so ashamed to myself.

Help me...

to avoid from off topic..

I'll put Formulas and Examples. Kindly illustrate them how to use this formulas to the givens, and how to answer them one by one.(Actually, There are a lot of things that I am confuse, not just this.)

Formulas:

double-angle formulas:

source formulas: Trigonometric Addition Formulas -- from Wolfram MathWorld

Given:

1) cos2x= 1-tan²x / 1+tan²x

2) cosΘ /1-sinΘ = 1+tanΘ/² / 1-tanΘ/²

3)cosΘ / 1-sinΘ = 1+1cosΘ+sinΘ / 1+cosΘ / 1+cosΘ-sinΘ / 1+cosΘ

I am sorry if there is wrong grammars. Thank you!

1)

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