Question

if cos x-3/5 x lies in the third quadrant find the value of sin x
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Answer 1

Step-by-step explanation:

cos x = -3/5

3rd quadrant

sin x will be negative

sin x = -4/5

Using formula of sin²x = 1 - cos²x

sin²x = 1 - 9/25

sin²x = 25-9/25

sin²x = 16/25

sin x = 4/5

but it will be negative as it lies on 3rd Quadrant

Answer 2

answer:

cos x=-3/5

we know the formula sin ^2 x=1- cos^2 x

sin^2 x= 1-9/25

sin^2x=25-9/25

sin^2x =16/25

sin^2x =4/5