Answer:
1. 75
2. 1
Step-by-step explanation:
The trigonometric equation <span> (sin Θ − cos Θ)^2 − (sin Θ + cos Θ)^3 can be simplified by:
</span>Using x for Θ:
<span>(sinx - cosx)^2 - (sinx + cosx)^2 </span>
<span>= (sin^2 x - 2sinxcosx + cos^2 x) - (sin^2 x + 2sinxcosx + cos^2 x) </span>
<span>= - 2 sinx cosx - 2 sinx cosx </span>
<span>= - 4 sinx cosx </span>
<span>= - 2sin(2x)
</span>
I hope it has come to your help.
Answer:
d. Yes, because any repeating decimal is rational.
Step-by-step explanation:
The given decimal fraction can be written as the repeating decimal ...

21 and -4, because -4x21 = -84, and 21+-4 (– 4) = 17