Trig
posted by Jasmine .
Please help with this one. I've worked it out in so many ways and can't tell what's correct.
sinA sinA
  
1+sinA 1sinA
Which answer is correct for the problem above?
a) 1+cotA
b) sinA tanA
c) 2tan^2A
d) secA cscA
common denominator: 1sin^2 A
and that is equal to cos^2 A.
Numerator:
sinAsin^2A  sinA sin^2 A
2sin^2 A
The result:
2sin^2A /cos^2 A and you recall that tan u= sinU/cosU
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