It was cluey for you to notice that Chris.
Complementary angles are angles that add up to 90.
Complementary trig ratios are ones where the values are equal for complementary angles.
I am probably not wording that very well.
Cosine stands for complementary ratio of sine (at least that is how I think of it)
Cosine(theta)=sine(90-theta)
Cotangent stands for complementary ratio of tan
Cot(theta)=tan(90-theta)
Cosec stands for complementary ratio of sec
cosec(theta)=sec(90-theta)
If you remember this it can help a lot.
We don't really need to use any calculators here.......
Notice that cosA = sin(90 - A)
So
cos 12 = sin(90 - 12)
cos12 = sin 78
And, if like things are subtracted, the answer = 0 !!!!
It was cluey for you to notice that Chris.
Complementary angles are angles that add up to 90.
Complementary trig ratios are ones where the values are equal for complementary angles.
I am probably not wording that very well.
Cosine stands for complementary ratio of sine (at least that is how I think of it)
Cosine(theta)=sine(90-theta)
Cotangent stands for complementary ratio of tan
Cot(theta)=tan(90-theta)
Cosec stands for complementary ratio of sec
cosec(theta)=sec(90-theta)
If you remember this it can help a lot.
Yeah...even if Alan and I disagree about how long it takes for 62 apples to fall off a tree.....I was assuming that the first apple was "on the fence" about the whole thing and it took him/her almost 3 hrs. to decide to take the "plunge" ...........either way, it's either 7.2 days or 7.3 days.......depending upon your local time zone and prevailing gravitational conditions, of course.......!!!