Question

cos 3into cos 45-sin 30 into sin 45 plz answer for my question​

Answer 1

Explanation:

so the answer is (√3-1)/2√2

Answer 2

Answer:

cos30°×cos45° - sin30°×sin45° = 1/4 (approx)

Explanation:

cos30°×cos45° - sin30°×sin45°

=  $\frac{\sqrt{3} }{2}$ × $\frac{1}{\sqrt{2} }$ - $\frac{1}{2}$ × $\frac{1}{\sqrt{2} }$

= $\frac{1}{\sqrt{2} }$ * $\frac{\sqrt{3} - 1}{2}$

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

= (1.732 - 1)/2× 1.414

= 0.732/2.828

= 732/2828

= 1/4 approx.

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