Option (b) is your correct answer.
Step-by-step explanation:

Given Trigonometric expression is

So, on rationalizing the denominator, we get

We know,

So, using this, we get

We know,

So, using this identity, we get


<u>Hence, </u>

(-2d^2+s)(5d^2-6s)
= (-2d^2*5d^2 + s*5d^2 -2d^2*-6s + s*-6s
= -10d^4 + 5sd^2 + 12sd^2 - 6s^2
=-10d^2 + 17sd^2 - 6s^2
This is the final result
Answer:
4.5 or 4 1/2
Step-by-step explanation:
The slop is 3 I hope that helped?