Answer:
sin(3π/7 - 2π/21)
Step-by-step explanation:
Given
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21
Required
Write a trigonometry formula for the expression
Using sine formula, we have:
sin(A - B) = sinAcosB - cosAsinB
The above formula can be applied to the given expression where
A = 3π/7
B = 2π/21
So, the trigonometry formula is:
sin 3π /7 cos 2π/ 21 − cos 3π/ 7 sin 2π/ 21= sin(3π/7 - 2π/21)
Keeping a detailed record of the procedure and results of a scientific experiment
Conducting an experiment to confirm the effects of gravity on Earth
Solving an expression in steps using the order of operations
Answer:
Meh
Step-by-step explanation:
The half of 14 is 7 and the half of 77 is 38.5
Hope this helped! (Plz mark me brainliest)