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).
Answer:
2
Step-by-step explanation:
there is 2: 3<u> 1 </u>
4
Answer:
First off if you want this answered make sure it's clear when your multiplying or using X
Answer:
10m - 16
It's basically the same thing but simplified to make it easier to solve.
Step-by-step explanation:
3(4m-2)-2(m+5)
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v
Distribution
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12m-6-2m-10
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Combining Like Terms
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10m-16
Answer:
x = (28 +- root -64) / (8)
Step-by-step explanation:
4x^2 -28x= -53 = 0
x = [-(-28)+- root (-28)^2 - 4 * 4 * 53] / 2 *4
x = (28 +- root 784 - 848) / (8)
x = (28 +- root -64) / (8)
