Question

a cylindrical glass of radius 4 cm and height 9 cm is filled with the glass

Answer 1

a cylindrical glass of radius 4 cm and height 9 cm is filled with the glass

Answer 2

Step-by-step explanation:

sin45° × sin30° + cos 45° × cos 30°

\begin{gathered}( \frac{1}{ \sqrt{2} } \times \frac{1}{2}) + ( \frac{1}{ \sqrt{2} } \times \frac{ \sqrt{3} }{2)} \\ = \frac{1}{2 \sqrt{2} } \times \frac{ \sqrt{3} }{ 2\sqrt{2} } \\ = \frac{(1 + \sqrt{3)} }{2 \sqrt{2} } \end{gathered}

(

2

1

×

2

1

)+(

2

1

×

2)

3

=

2

2

1

×

2

2

3

=

2

2

(1+

3)