Give the measure of the acute angle with each given value to the nearest tenth of a degree.

Question

cos A = 0.1 (84.3 degrees)
sec D = 1.8 (65.3 degrees)

That is all it gives :(
How would I go about solving this?

Answer 1

cos A = .1

In your calculator type in:

cos^-1(.1)

and for sec D:

1. 1/cos D = 1.8
2. 1.8 Cos D = 1
3. 1/1.8 = Answer
4. cos^-1 (Answer from step 3)