Answer:
(sinx+cosx)²=sin2x+1
RHS
sin2x+1. (sin2x=2sinx*cosx)
2sinx*cosx+1. (sin²x+cos²x=1)
2sinx*cosx+sin²x+cos²x.
(sinx+cosx)²
9514 1404 393
Answer:
-16
Step-by-step explanation:
The absolute value function gives the positive value of the argument, so this is ...
-4|-4| = -4·4 = -16
Answer:
C. 31
Step-by-step explanation:
1. Convert mixed numbers into improper fractions:
· 2² + ( - 2) ÷ 3
2. Calculate within the parenthesis:
· 2² + ÷ 3
3. Calculate the exponent:
· 4 + ÷ 3
4. Multiply and divide (left to right):
29 + ÷ 3
29 +
5. Add:
6. Convert the improper fraction to a mixed number:
= 31
hope this helps!
-9/10 + 3/5 - 9/10 = -1.2 and -1.2 = -1 1/5 so if we add -3/5 we get -1.8 or -1 4/5 so therefore your answer is -3/5
The trick is to realize what your choices are.
if m or n or both are divisible by 5, then 2mn will be divisible by 5
I don't know if you know about x mod(5), but in that case there can only be 4 possibilities for m and n
m mod (5) = +/- 2 or m mod(5) = +/- 1
In the first case m^2 = 4 mod(5) and in the second case m^2 = 1 mod(5) N has the same considerations.
If m and n have the same modular results (both are [say] 2 ) then m^2 - n^2 which be 0
If they are different, then (m^2 + n^2) mod 5 = 0