Question

please help...
if 3sinθ + 4cosθ = 5,
3cosθ-4sinθ = ?

Answer 1

comt to twiddla
http://www.twiddla.com/583597

Answer 2

wt is dat?

Answer 3

click on it

Answer 4

it is like a board so that i can explain it to u easily

Answer 5

k..

Answer 6

are u here........................

Answer 7

Light has finally dawned....

Answer 8

This is just a 3,4,5 triangle with sin =3/5 and cos = 4/5.

Zero.

Answer 9

how did u do that estudier? can u pls tell me

Answer 10

First I did all the usual things, substitution, cross multiplication, trig things and I always had a theta in the answer.

Then I thought about triangles and I saw almost straight away that a 3,4,5 Pythagorean triangle was the way to the answer (I should have thought of it sooner because there is a 3,4,5 in the question:-)

Answer 11

so how will it be a part of the triangle?
i can't find a connection..pls help

Answer 12

What is sin theta and cos theta in a 3,4,5 triangle?

Answer 13

sin theta= 3/5
cos theta= 4/5

Answer 14

thank u..:) how did u guess it from the question?

Answer 15

I explained in my post above.

Answer 16

First I did all the usual things, substitution, cross multiplication, trig things and I always had a theta in the answer. Then I thought about triangles and I saw almost straight away that a 3,4,5 Pythagorean triangle was the way to the answer (I should have thought of it sooner because there is a 3,4,5 in the question:-)

Answer 17

thanks a lot.... :)

Answer 18

u r welcome.