Question

express the ratio positive angle which is less than 45° the quantity is cos (-84)​

Answer 1

Given: The trigonometric term cos (-84)​

To find: Express the ratio positive angle which is less than 45°

Solution:

• Now we have given the term cos (-84)​, and we have to express the ratio positive angle which is less than 45°.

• Now we know that:

               cos (-x) = cos x

• So cos (-84) = cos (84)

• Now it can be written as:

               cos x = sin (90 - x)

• So cos 84 = sin (90 - 84)

                 = sin 6°

Answer:

           So the answer is sin 6°