Question

2tan²45⁰ + cos²30⁰ - sin 60⁰

Answer 1

Answer:

572 *28=2782

527*28×689^2882

Answer 2

Answer:

the answer is 1.885

Explanation:

$\tan {45}^{o} = 1 \\ \cos {30}^{o} = \frac{ \sqrt{3} }{2} \\ \sin( {60}^{o} ) = \frac{ \sqrt{3} }{2}$

$2 \tan^{2} {45}^{o} + \cos^{2} {30}^{o} - \sin( {60}^{o } ) \\ = 2 \times ( {1}^{2} ) + ({\frac{ \sqrt{3} }{2} } )^{2} - \frac{ \sqrt{3} }{2} \\ = 2 + \frac{3}{4} - \frac{ \sqrt{3} }{2} \\ = \frac{11}{4} - \frac{ \sqrt{3} }{2} \\ = \frac{11 - \sqrt{3 } \times 2}{4 } \\ = \frac{11 - 3.46}{4} \\ = \frac{7.54}{4} \\ = 1.885$

hope it helps