Show how these Trig Identities are true? (sinx-1)(tanx + secx) = -cosx & (sinx-1)(tanx + secx) = -cosx?

(sinx - 1)(tanx + secx)

= (sinx - 1)[(sinx / cosx) + (1 / cosx)]

= (sinx - 1)[(sinx + 1) / cosx]

= (sin²x - 1) / cosx

= -cos²x / cosx

= -cosx

Hi,

Although I do not think it is right for me to give you away answers to your homework, I have a wonderful video lesson on my website that could help you learn how to use and memorize all the trig identities you need. Check this out:

http://www.cosmolearning.com/mathematics/videos/53...

I believe teaching yourself how to deal with trig identities will benefit you much more than simply telling you the answer to this particular math question: Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime.

Hope it helps! (=