Question

If Sinθ = -3/5 , θ lies in third quadrant then find the value of Cosθ​

Answer 1

Answer

Cosθ=4/5

Step-by-step explanation:

Sinθ = -3/5

or, Sin^2 θ=9/25

Now,

Sin^(2)θ+Cos^(2)θ=1

or, Cos^(2)θ= 1-Sin^(2)θ

[Hence, putting the value

or, Cos^(2)θ= 1-9/25 of Sin^2 θ=9/25]

or, Cos^(2)θ= 16/25

or, Cos^(2)θ= 4/5

Answer 2

Answer:

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