Thinking of ed.... & math....

[agengrgal]

Hey barnabus!

Answer me this 'cause I still haven't been able to figure it out.

What's the square root of (4 * sine-squared x + 9 * cosine-squared x)?

I'm stumped and can't figure out how to factor it so it pops out from that damned square root sign!

aggie :o)

Comments

[serendipity17]

Isn't sine-squared x + cosine-squared x = 1?

I have a headcold, so thinking is fuzzy. Can you set up it up like (2x+3y)+(2x-3y)?

[tangential1]

I totally fail. I can't get past reducing it to sqrt(4+5cos^2(x)) Blah...