Given:
The four expression in the options.
To find:
Which expression is equal to –1.
Solution:
In option A,
In option B,
In option C,
![[\because \sin(\pi+\theta)=-\sin \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Csin%28%5Cpi%2B%5Ctheta%29%3D-%5Csin%20%5Ctheta%5D)
In option D,
![[\because \tan(\pi+\theta)=\tan \theta]](https://tex.z-dn.net/?f=%5B%5Cbecause%20%5Ctan%28%5Cpi%2B%5Ctheta%29%3D%5Ctan%20%5Ctheta%5D)
Therefore, the correct option is C.
Answer:
4
Step-by-step explanation:
1/3 of 12 is 1/3*12. 12/3=4.
9.2x-9<7
add 9 to both sides, 2x<16
divide both sides by 2, x<8
A.
10.n<5
-4n+11>-9 Subtract 11 from both sides
-4n>-20 then, divide both sides by -4
In these greather than less than equations, when you divide a negative by another negative, you must flip the sign
so that would be, n<5
D
1/2 of the class are 5th and 4th
1/2 of 96= 48
1/4 of 48 =12
