Given that cos A= 3/2 cosB= 24/25 where A and B are acute find the exact values of

a) tan A

b) sin B

c) cos (A-B)

d) tan(A+B)

could any show me how these questions are solved?

Thank you.

Results 1 to 7 of 7

- Nov 9th 2009, 06:46 AM #1

- Joined
- Sep 2009
- Posts
- 98

- Nov 9th 2009, 07:04 AM #2

- Nov 9th 2009, 07:17 AM #3

- Joined
- Sep 2009
- Posts
- 98

- Nov 9th 2009, 07:18 AM #4

- Joined
- Mar 2007
- Posts
- 1,240

- Nov 9th 2009, 07:23 AM #5

- Nov 9th 2009, 08:35 AM #6

- Joined
- Sep 2009
- Posts
- 98

- Nov 9th 2009, 08:56 AM #7

- Joined
- Jan 2008
- From
- Big Stone Gap, Virginia
- Posts
- 2,550
- Thanks
- 15
- Awards
- 1

Ok, Oasis1993, that helps.

Since Cos A = 3/5, this means that x = 3 and r = 5. Solve for y in the following equation:

(a)

Since Cos B = 24/25, this means that x = 24 and r = 25. Solve for y in the following equation:

(b)

For (c) and (d), use your sum-difference formulas using the information you are given and the information you found.