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Mathematics 10 Online
OpenStudy (anonymous):

Prove: tan^2 θ•cos^2 θ + cos^2 θ = 1.

jimthompson5910 (jim_thompson5910):

hint: tan = sin/cos

OpenStudy (anonymous):

use pythogorean theorem i suppose

OpenStudy (anonymous):

so cos*tan would equal sin?

jimthompson5910 (jim_thompson5910):

correct

jimthompson5910 (jim_thompson5910):

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

OpenStudy (anonymous):

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

OpenStudy (skyz):

IM NOT SMART! SO I NO HELP?!

jimthompson5910 (jim_thompson5910):

the pythogorean trig identity is sin^2 + cos^2 = 1 http://www.regentsprep.org/Regents/math/algtrig/ATT9/pythagoreanid.htm

OpenStudy (anonymous):

ohhhh okay

OpenStudy (anonymous):

Hai Pls. :)

OpenStudy (anonymous):

haii 123! :D

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