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alexkrol10
13.11.2019 •
Mathematics
Sin 300° = 2 sin 150° cos 150° use exact values to show it is true
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Ответ:
see explanation
Step-by-step explanation:
left side = sin300° = - sin60° and sin60 =
, thus
sin300° = -![\frac{\sqrt{3} }{2}](/tpl/images/0371/5285/a1d2c.png)
right side
sin150° = sin30° =
and
cos150° = - cos30° = -
, thus
2sin150°cos150°
= 2 ×
× -
= - ![\frac{\sqrt{3} }{2}](/tpl/images/0371/5285/a1d2c.png)
left side = right side ⇒ True
Ответ:
Therefore rounded to the nearest thousandth his batting average is 0.422