Answer:
15
Step-by-step explanation:
jk
Answer:
16
Step-by-step explanation:
8/2(2+2)
- According to the rules of BEDMAS, solve the values inside the bracket.
8/2 (4)
- Simplify the fraction outside the bracket.
4(4)
- Multiply the two values.
= 16
Given: sin theta = 2/5. This tells us that the lengths of the opp side and the hyp are 2 and 5 respectively. The adj side is found using the Pyth. Thm.: 5^2-2^2= 25-4 = 21, so that the adj side is sqrt(21).
The double angle formula for the sine is sin 2theta = 2 sin theta *cos theta.
In this particular problem, the sine of 2theta is 2*(2/5)*[sqrt(21) / 5], or:
(4/25)*sqrt(21).
