(3b) / (5b - 7) = 8/11
cross multiply
8(5b - 7) = 11(3b)
40b - 56 = 33b
-56 = 33b - 40b
-56 = -7b
-56/-7 = b
8 = b
The correct answer is A.
Exponents should be multiplied when the expression is in the form (x^a)^b. In this case, the result is always equal to x^(a*b).
For B and D, the exponents should be added since the base is the same. Exponents in C should be subtracted since they are divided and cancel each other out
Answer:
sin^2α
Step-by-step explanation:
I will just pose x instead of alpha here to make things simpler

we know that sin^2x = 1 - cos^2x so...


we can rewrite using trigonometric identities (tan = sin/cos)...

I am thinking it might be 21 but i am not sure