Question

write the following in terms of sin(theta) only : cos(theta).... help ?

Answer 1

What terms?

Answer 2

cos(theta) in terms of sin(theta) only

Answer 3

here is the question

Answer 4

I think that you are using the fact that sin\(^2\)(x)+cos\(^2\)(x)=1 which is merely algebra. Subtract and root both sides to get sine alone.

Answer 5

So, kind of like the pythagorean theorem: x\(^2\)+y\(^2\) = z\(^2\), solve for x?

Answer 6

I dont know because in my book the first clue is that cos(x)=sin(x)/tan(x).. this is a trig class

Answer 7

tangent = \(\large \frac{sin}{cos}\)

Answer 8

So you have: \(\huge\frac{sin(x)}{\frac{sin(x)}{cos(x)}}\)

Answer 9

how can i simplify that to sin(x) terms only

Answer 10

cos(x)= +/- sqrt (1-sin^2(x))

Answer 11

You know in a fraction: \(\frac{a}{\frac{b}{c}} = \frac{ac}{b}\)

Answer 12

that right! thank you so much!