<span>To determine the value of c, we can use cross multiplication of the given ratios composing the proportion. 13 times 3 is equal to 39. Then, divide the obtained answer by 6 giving us the final answer which is equal to 6.5.
Hence, the answer to this item is 6.5</span>
Rewriting the left hand side,
csc²t - cost sec t
= (1/sin²t)-(cost)(1/cost)
= 1/sin²t - 1
= 1/sin²t - sin²t/sin²t
= (1-sin²t)/sin²t
= cos²t/sin²t
= cot²t
25 - 21 = 4 questions of his history incorrectly ;
4 / 25 = 0.16 represents the fraction of problems he answered incorrectly ;
B is the answer. PLEASE MARK AS BRAINLIEST!!!
Answer:
perimeter above side length four times
Step-by-step explanation:
we know that
The perimeter of a square is equal to

where
b is the length side of the square
Solve the formula by b
That means----> isolate the variable b
Divide by 4 both sides

we have

substitute

Rewrite the expression 

so
perimeter above side length four times