Question

Find the exact values of sin A and cos A. Write fractions in lowest terms.

Answer 1

sin A = four thirds; cos A = three fourths
sin A = five fourths; cos A = five thirds
sin A = four thirds; cos A = four fifths
sin A = four fifths; cos A = three fifths

Answer 2

@Michele_Laino please help really quick? This usually isn't hard for me but I don't understand what im doing wrong

Answer 3

Sin A = opposite / hypotenuse = 8/10 = 4/5
Cos A = adjacent/ hypotenuse

Can you continue?

Answer 4

Cos A=6/10 = 3/5 ?

Answer 5

correct! \(\cos A= 3/5\)

Answer 6

furthermore, we can write:
\(8= 10 \sin A\), so we get:
\[\sin A = \frac{8}{{10}} = ...?\]