The answer would be C (P=T/2). This can be explained by examining the ratio. If you were to put in the answer of T = 12, then you would be looking for T/2 or 6, assuming we're giving them each half of the amount original held by grandmother.
thinking you braindead mf
The answer to your question is: Yes, I can.
You haven't asked for the trigonometric expression, but here it is anyway:
The <u>cosine</u> function is the reciprocal of the secant function.