Question

Prove: tan^2 θ•cos^2 θ + cos^2 θ = 1.

Answer 1

hint: tan = sin/cos

Answer 2

use pythogorean theorem i suppose

Answer 3

so cos*tan would equal sin?

Answer 4

correct

Answer 5

you will be left with sin^2 + cos^2 = 1

but the left side will turn into 1 because of the pythogorean theorem timo86m is talking about

Answer 6

I'm not really sure what the pythogorean theorem is though o: but i understand this

Answer 7

IM NOT SMART! SO I NO HELP?!

Answer 8

the pythogorean trig identity is sin^2 + cos^2 = 1

http://www.regentsprep.org/Regents/math/algtrig/ATT9/pythagoreanid.htm

Answer 9

ohhhh okay

Answer 10

Hai Pls. :)

Answer 11

haii 123! :D