Question

Can someone help me on how to solve this?
cos[Arc tan (5/12) - Arc cot(4/3) ]

Answer 1

me.. use pythagorean theorem...

Answer 2

like how?

Answer 3

for example ... cos ( arc sin 1/2 ) .. how to solve that??

Answer 4

√3 /2

Answer 5

correct.. then, you will solve that by using that...

Answer 6

aw ok ok thank yew ^^

Answer 7

but, I'm not sure.. haha, sorry. :(

Answer 8

Of course, you may wish to expand it, first.

cos(x-y) = cos(x)(y)+sin(x)sin(y)

Answer 9

that would be cos(√3/2 -4/5) ?

Answer 10

no?

Answer 11

then what? :D

Answer 12

8/65? hm, am i right, @tkhunny ?

Answer 13

Absolutely not.

\((a + b)^{2} \ne a^{2} + b^{2}\) generally.

\(log(a + b) \ne log(a) + log(b)\) generally.

\(\cos(a + b) \ne \cos(a) + \cos(b)\) generally.

Start here.