Trig

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 1-sinA

Which answer is correct for the problem above?

a) 1+cotA
b) sinA tanA
c) -2tan^2A
d) secA cscA


common denominator: 1-sin^2 A

and that is equal to cos^2 A.

Numerator:
sinA-sin^2A - sinA -sin^2 A
-2sin^2 A

The result:
-2sin^2A /cos^2 A and you recall that tan u= sinU/cosU

  1. 👍 0
  2. 👎 0
  3. 👁 87
asked by Jasmine

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math

    How many ways can 3 students be chosen from a class of 20 to represent their class at a banquet? (1 point) 6,840 3,420 1,140 2,280 15. You and 3 friends go to a concert. In how many different ways can you sit in the assigned

    asked by Anonymous on April 17, 2013
  2. math

    If 3 people worked and earned $5554.52 in one day. How much does each person earn if one worked for 5 hours, the other worked 7 and the other worked 8 hours?

    asked by Anonymous on November 27, 2016
  3. English

    1. What was their job? 2. They worked at a bakery. 3. He worked at a bakery, and she worked for a bank. 4. What were their jobs? 5. He worked at a bakery, and she worked for a bank. 6. They worked at a bakery. (Will you look at

    asked by rfvv on April 15, 2010
  4. history

    list all the ways Julias Caesar worked to gain political power in Rome. =] thanks!

    asked by kelly on November 8, 2007
  5. Calculus

    Find the limit as x approaches infinity. sqrt(81x^2 + x)− 9x. I've worked this two different ways and have gotten 0 and 1/9, neither of which is the right answer according to the homework system??

    asked by kelly on September 14, 2015
  6. math

    One month, ruby worked 6 hours more than Isac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 126 hours. Find the number of hours each person worked

    asked by maleia on September 27, 2015
  7. Stats

    Two dice are tossed. What is the probability that the sum of both dice is a prime number? this is the answer i have ; Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any

    asked by Megan on July 1, 2013
  8. Statistics

    Two dice are tossed. What is the probability that the sum of both dice is a prime number? This is what I have so far Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any

    asked by Meg on July 2, 2013
  9. math 156

    Dan, Shelly, Kirby worked together on a lawn. together they earned $4000. Dan worked 40 hrs, shelly worked 25hrs and Kirby worked 15 hrs. how should they divide the money? This one I do not understand, can anyone help me?

    asked by Rmz on December 3, 2009
  10. Math grade 5-6

    Alice works part-time after school. On Monday, Alice records that she worked three and two-sixth hours. On Tuesday, Alice records that she worked one and seventy-five hundredths hours. On Wednesday, Alice records that she worked

    asked by Lemi on December 7, 2015
  11. Math grade 5-6

    Alice works part-time after school. On Monday, Alice records that she worked three and two-sixth hours. On Tuesday, Alice records that she worked one and seventy-five hundredths hours. On Wednesday, Alice records that she worked

    asked by Lemi on December 8, 2015

More Similar Questions