Question

evaluate cos^(2) 90 degrees - sin^(3) 180 degrees +tan ^(2) (-45degrees) -sin^(2) 270degrees + tan ^(5) 45degrees

Answer 1

i got 1 as my answer but i'm not sure if it is correct

Answer 2

well cos(90) = 0 and sin(180) = 0

tan(-45) = -1 and tan(45) = sin(270) = -1

so you have

(0)^2 -(0)^3 + (-1)^2 -(-1)^2 + (1)^5 =

just evaluate

Answer 3

so is 1 correct?

Answer 4

looks like it

Answer 5

thank you so much!