Find exact value of cosine theta for an angle theta with a sine theta equals 3/8 and with its terminal side in quadrant 1

B

Step-by-step explanation:

Choice A is incorrect. Nothing is minus in quad 1.

Cos(theta) = sqrt(1 - sin^2(theta) )

Cos(theta) = sqrt(1 - (3/8)^2 )

Cos(theta) = sqrt(1 - 9/64)

cos(theta) = sqrt(55)/sqrt(64)

Cos(theta) = sqrt(55) / 8

Looks like B

Note: you should do this one before any of the others. It uses all the same general principles as the others.

answer: what are the following choices

id

step-by-step explanation:

idk

idk

i know the way

and

idk