Question

cos30degree .cos45degree - ssi30degree .sin 45degree​

Answer 1

Answer:

($\sqrt{3}$ - 1 )/ 2$\sqrt{2}$

Step-by-step explanation:

= cos30° .cos45° - sin30° .sin 45°

= $\sqrt{3}$ / 2 X 1 / $\sqrt{2}$  - 1 /2 X 1 / $\sqrt{2}$

=  $\sqrt{3}$ / 2$\sqrt{2}$   -  1 /  2$\sqrt{2}$

=($\sqrt{3}$ - 1 )/ 2$\sqrt{2}$

Answer 2

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