Question

A=1
give your answers for A in the interval 0 14 years ago

Answer 1

A=1 degrees

Answer 2

for 2secA

Answer 3

search on the net?

Answer 4

It doesn't work.

Answer 5

Is this the full question?

Answer 6

No.
4=2secA

(which is 1 degrees ~ because it's asking for degrees).
Then you need to find the solutions in the intervals that I gave.

Answer 7

ans is 60 degrees

Answer 8

Why?

Answer 9

4 = 2sec(A)

divide both sides by 2

2 = sec(A)

sec(A) = [1/cos(A)]
For this reason multioly both sides by cos(A), OR u can say cross multiply

2cos(A) = 1

Divide both sides by 2

cos(A) = 1/2

A = \[\cos^{-1} (1/2)\]

So A = 60

Answer 10

Hm Ok.

But wy first switch the 2 to 1/2 because adding the cos? Which would give 1...

Answer 11

Which step are u talking about

Answer 12

Um, never mind. I get it. :)

Answer 13

There's another answer though. The other is 300.

Answer 14

Cool, good luck

Answer 15

thanks

Answer 16

Your welcome, how is your calculus coming along

Answer 17

cos function repeats after 2(pi) degrees hence general solutions for cosine functions are

\[2n \pi -\alpha\]
where alpha is the angle
hence put n=1
hence you get your other answer as 300 degrees