Question

Please Help!!! 5 STARS

Let cos(−θ)=45 and tanθ>0 .

What is the value of sin(−θ) ?

Answer 1

`-(3)/(5)`

Explanation:

Answer 2

Explanation:

Alright, lets get started.

We know the identity, even/odd

cos(-Θ) = cos (Θ)

Means cos(Θ)=
`(4)/(5)`

Using triangle method and SOH CAH TOA, please refer the diagram attached

sin(θ)=
`(3)/(5)`

We know, sin(-Θ)= -sin(Θ)

So, sin (-Θ) =
`-(3)/(5)`

So the answer is C : Answer