Posted by **gin** on Saturday, March 19, 2011 at 9:52pm.

For each expression in column I, choose the expression from column II to complete an identity:

Column I Column II

1. -tanxcosx A. sin^2x/cos^2x

2. sec^2x-1 B. 1/sec^2x

3. sec x/cscx C. sin(-x)

4. 1+sin^2x D.csc^2x-cot^2x+sin^2x

5. cos^2 x E. tanx

I figured #1 is C, #2 is A, And #4 is D, but I am not sure about the rest. Please give answers and explain. Also, for the following, verify that each trig equation is an identity and explain why. NOTE: I using @ to mean angle.

6. cot^2t-1/1+cot^2t = 1-2sin^2t

7. 1-cos@/1+cos@ = 2csc^2@-2csc@cot@-1

## Answer This Question

## Related Questions

- Trig - Column 1 Column 2 sec theta - cos theta tan theta sin theta Question: how...
- Trig - The question is: Set up a 2 column proof to show that each of the ...
- Trig - Column 1 Column 2 (sin theta + cos theta)sq 1 + 2sin theta cos theta ...
- trig 26 - simplify to a constant or trig func. 1. sec Ču-tan Ču/cos Čv+sin Čv ...
- chemistry - Reaction 1: I2(aq)Cu^+2(aq) Ag^+(aq)Br2(aq) Column 1---Column 2---...
- math - How would you establish this identity: (1+sec(beta))/(sec(beta))=(sin^2(...
- Algebra - 1. Compare the quantity in Column A with the quantity in Column B. ...
- trig - how do you start this equation i've been tryng it for 20min. sec^6x(...
- Tech - 4. after creating a column heading and or typing text within a column ...
- Ed. Tech - After creating a column heading and/or typing text within a column, ...

More Related Questions