Question

If cot A =3/4 find the value of 3 cos A+5 sin A,where A lies in the first quadrant

Answer 1

Answer:

Hi!!!

cot A = 3/4

using triangle method,

sin A = 4/5

cos A = 3/5

Thus,

3 cos A + 5 sin A

= 3*(3/5) + 5*(4/5)

= (9/5) + 4

= 29/5

☺