Help! Find the exact value of the expression w/o a calculator?
(1/(sec^2 40 degrees)) + (1/csc^2 40 degrees)
Can you explain too?

Question

Help! Find the exact value of the expression w/o a calculator? 
(1/(sec^2 40 degrees)) + (1/csc^2 40 degrees)
Can you explain too?

anonymous · Answer

easy

anonymous · Answer

lolno

anonymous · Answer

= cos^24 + si^2 40 = 1

anonymous · Answer

use x instead of 40 might make it easier

amistre64 · Answer

good thing openstudy isnt a calculator :)

amistre64 · Answer

find 2 degrees that you already know to calculate with

anonymous · Answer

I was going to say that

anonymous · Answer

yes - this is a standard trig identity:
cos^2x + sin^2x = 1

anonymous · Answer

I was also going to say find csc(40) * csc (40)

anonymous · Answer

$$\frac{1}{\sec^2(x)}+\frac{1}{\csc^2(x)}=\cos^2(x)+\sin^2(x)$$

anonymous · Answer

finally someone saw it lol, nice job satellite :)

anonymous · Answer

the "40" degrees is a red herring. makes no difference what the input is, you will get 1 in any case

anonymous · Answer

Tricksters. ty!

anonymous · Answer

yw from all of us i am sure

anonymous · Answer

attachment

anonymous · Answer

There's more than one way to go about this, but knowing the identity helps

anonymous · Answer

my scanner isnt as fast as satellite lol :( i need a new scanner >.>

anonymous · Answer

wow that was fast. mine takes like ten minutes

anonymous · Answer

not fast enough! haha