Question

3SinA+5CosA=4
find 5SinA-3cosA​

Answer 1

Answer:

4.24

Step-by-step explanation:

let 5sina - 3cosa =X

squaring both equall22

we get 1 eq

9sin^2a +25cos^2a +30 Sina. cosa = 16

2 eq

35sin^2a +9cos^2a - 30 Sina cosa = x^

add both

34sina^ +34 cos^2a =x^2+16

34(sin^2 +cos^2a) =x^2+16

34x1 =x^2+16

x^2 =34-16

x=√18

x=4.24