Question

how can i calculate value of this-
$50\cos ^{2} (30)$

Answer 1

Hey friend...! here's your answer
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$\cos( 30) = \frac{ \sqrt{3} }{2} \\ \\ 50 { \cos(30) }^{2} \\ \\ 50 { \frac{ \sqrt{3} }{2} }^{2} \\ \\ 50 \times \frac{3}{4} \\ \\ \frac{150}{4} \\ \\ \frac{75}{2}$

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Hope its help

Answer 2

$\bf \large \it \: Hey \: User!!!$

$<b > we know that cos(30) = √3/2$
$<b > therefore 50 cos(30)² = 50 × (√3/2)²$
$<b > = 50 ( √3/2 × √3/2 )$
$<b > = 50 × 3/4$
$<b > = 150/4$
$<b > = 75/2 or 37.5$

$\bf \large \it \: Cheers!!! \:$