Question

If the sin 90° = 1, then the cos 0° = _____.

Answer 1

I know sin(Ø-90)=cos(Ø)
But I was wondering if the 1 is carried or changed.

Answer 2

is that the only identity you are given?

Answer 3

Im only given this: If the sin 90° = 1, then the cos 0° = _____.
And a few answers:
0 because the angles are complementary

1 over 22 because the angles are complementary

square root 3 over 2 because the angles are complementary

1 because the angles are complementary

Answer 4

do you know what complementary angles are?

Answer 5

Two angles where both or either equal 90°?

Answer 6

no, it's two angles that add up to 90 degrees.
the identity you gave was actually incorrect. you switched the terms inside the sine function, it should be
sin(90-Ø)=cos(Ø)

Answer 7

ok.

Answer 8

so if sin(90)=1, then what does Ø equal?

Answer 9

cos(0)=?

Answer 10

well, Ø would equal 0, but yes, sin(90)=cos(0)
but what does sin(90) equal?

Answer 11

*also equal

Answer 12

1

Answer 13

and you have your answer :)

Answer 14

:) thanks