33 is composite
49 is composite
21 is composite
Answer:
30.06
Step-by-step explanation:
1/4-1/16=
=1*4/16 - 1*1/16
=4/16-1/16
=3/16
Or 1/8
Answer:

Step-by-step explanation:
Given

See attachment
Required
Explain and correct the error
The error in the equation is that: the formula of cosine of angle A is used to calculate the sine of angle A.
The ratio can be corrected as by using:



Answer: (21,12)
Step-by-step explanation: