Question

If cos(0) = 3 over 10 what is sin(0)

Answer 1

`\sin\theta=(√(91))/(10)`.

Explanation:

From the identity
`\sin^2\theta+\cos^2\theta=1`, we have that
`\sin^2\theta+\left((3)/(10)\right)^2=1`. Solving for
`\sin\theta`, we find that it is equal to
`\pm (√(91))/(10)`. Because only
`(√(91))/(10)` appears in the answer choices, we have that
`\sin\theta=(√(91))/(10)`.