Which expression shows the value of c?
do u know the difference between the two functions, cos and tan, shown in the choices?
yes Tan is opp/adj , Sin is Opp/Hyp, and Cos is adj/hyp
c is hypotenuse, b is adj and a is opp
good good good...now here is the tricky part: do u know what the sum of all angles in a triangle is?
well yes...sort of....the sum of all angles in a triangle is 180. So in this case, u know one is 90 and the other is 45....what is the third angle equal to?
yes cos 45=b/c but thats not one of the choices....so lets try out the other 45 angle okay? |dw:1436471176366:dw|
what is cos45 = ? / ? then