Which equation is not true for all values of 0?
a. csc 0 = sec 0 / tan 0 cos 0
b. sin ^2 0+cos^2 0 = sec^2 0 (1-sin^2 0)
c. cot 0 - tan 0 = cos 0 csc 0 - sin 0 sec 0
d. sin ^2 0 + cos ^2 0 + tan ^2 0 = sec^2 0

Question

Which equation is not true for all values of 0?
a. csc 0 = sec 0 / tan 0 cos 0
b. sin ^2 0+cos^2 0 = sec^2 0 (1-sin^2 0)
c. cot 0 - tan 0 = cos 0 csc 0 - sin 0 sec 0
d. sin ^2 0 + cos ^2 0 + tan ^2 0 = sec^2 0

anonymous · Answer

@aum :)

aum · Answer

Is it zero or the Greek letter phi $\phi$ or $\theta$?

anonymous · Answer

The one with a line through it. Sorry, I forgot to add that.

aum · Answer

It is phi.

aum · Answer

Is the first choice $$
\csc(\phi) = \frac{\sec(\phi)}{\tan(\phi)\cos(\phi)}~~\text{or } \
\csc(\phi) = \frac{\sec(\phi)}{\tan(\phi)}\cos(\phi)
$$

anonymous · Answer

follow me savanah