Question

cos square 30 + sin square 45 - 1/3 tan square 60

Answer 1

cossquarre 30= root3/2 ka whole square=3/4
sin square 45=1/root 2 kawhole square=1/2
1/3tan. square 60=1/3×root 3ka whole square=1/3 ×3=1


3/4 +1/2+1
3+2+4whole/4
9/4

Answer 2

$cos30 = \frac{ \sqrt{3} }{2} \\ sin45 = \frac{1}{ \sqrt{2} } \\ tan60 = \sqrt{3}$
now putting this value on it
$( \frac{ \sqrt{3} }{2} ) ^{2} + (\frac{1}{ \sqrt{2} } ) ^{2} - \frac{1}{3} \times ( \sqrt{3} ) ^{2}$
by solving this we get
$= \frac{3}{4} + \frac{1}{2} - \frac{1}{1 } \\ = \frac{3 + 2 - 4}{4} \\ = \frac{1}{4}$
hope its help you

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