Question

Ok so in order to solve this problem #54 you have to use the result from problem #53. #53. cos 2a = cos^2a - sin^2a HINT: WRITE TAN 2A AS TAN (A+A)........................#54. tan (pi/4 +a) - tan (pi/4 -a) = 2tan2a

Answer 1

@perl

Answer 2

tan(pi/4+a)={tan pi/4+tan a}/{1-tan pi/4*tan a}
and tan pi/4=1
tan(pi/4-a)={tan pi/4-tan a}/{1+tan pi/4*tan a}

Answer 3

I don't understand

Answer 4

Loving: Your question needs clarification. Exactly what are you asking? looking for?
Please remember that others don't have access to your Problems #53, #54, etc., and may need to have that access to understand what your goal or goals are.

Answer 5

I gave question #53 and #54

Answer 6

Looking for exact values

Answer 7

@Loser66

Answer 8

@SolomonZelman

Answer 9

@DaBest21

Answer 10

im here

Answer 11

um i dont know srry

Answer 12

Are you trying to prove that one side is equal to the other?

Answer 13

can you put question 54 here by itself

Answer 14

#54. tan (pi/4 +a) - tan (pi/4 -a) = 2tan2a

Answer 15

@triciaal

Answer 16

now what are the directions? does it say prove that.....

Answer 17

hold on brb

Answer 18

I think we have to solve 53 first

Answer 19

It wants you to verify each identity