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rationalise cosa/1+sin a and youll get the right part of equation

|dw:1362720006791:dw|

Please explain briefly TT_TT

k here it goes do you know how to rationalise

NO

okay then multiply in the numerator and denominator by 1-sinx and see if you get it now

combine like terms. etc. follow your algebra rules to combine fractions and so forth.

Yep, ^^ don't worry i'm done with this :||

What do you mean? I am about to verify it. It is fairly short.

time to go home.

The signs on the problem are correct, right?

Yes

Great. See you later.