Answer:
<h3>B. </h3>
Step-by-step explanation:
<h3>Because A. Is not pentomino </h3><h3>C. Is not pentomino</h3><h3>D. There are no pentomino</h3>
Formatted Options:
A. sin²A−cos²A
B. sin²A+cos²A
C. cos²A−sin²A
D. cosA−sinA
Answer:
C. cos²A−sin²A
Step-by-step explanation:
From the double angle formulas, we know that:
cos (A + B) = cosAcosB - sinAsinB
So, if B = A, then the above equation becomes;
cos(A + A) = cosAcosA - sinAsinA [i.e replacing B with A]
=>cos(2A) = (cosA)² - (sinA)²
=> cos(2A) = cos²A - sin²A
Therefore,
cos(2A) is equivalent to cos²A - sin²A
16(4) = 64. 7(3) = 21
64/21 simplifies to 3 and 1/21 as 21 goes into 64 three times. Option C is your answer.
Answer:
Step-by-step explanation:
Answer: No, for example, 50/2=25, 25 isn't even
Step-by-step explanation:
