Question

if A lies between 90 and 270 such that cos A=-3/5 then possible value of sin A + tan A is

Answer 1

Step-by-step explanation:

cosA = - 3/5 = b/h

using pythagoras theorem

h² = p² + b²

5² = p² + (-3)²

p² = 25 - 9

p² = 16

p = 4

now

sin A = 4/5

tan A = -4/3

now, sinA + tanA

4/5 - 4/3

(12- 20)/15

-8/15