Question

cos2 45°+ sin2 30° find the value ​

Answer 1

Answer:

Please refer to the above attachment. Hope this helped you! ☺

Answer 2

cos² 45° + sin² 30° = 3/4

Given :

The expression cos² 45° + sin² 30°

To find :

Value of the expression

Solution :

Step 1 of 2 :

Write down the given expression

The given expression is

cos² 45° + sin² 30°

Step 2 of 2 :

Find the value of the expression

cos² 45° + sin² 30°

$\displaystyle \sf{ = {\bigg( \frac{1}{ \sqrt{2} } \bigg)}^{2} + {\bigg( \frac{ 1 }{2} \bigg)}^{2} }$

$\displaystyle \sf{ = \frac{1}{2} + \frac{1}{4} }$

$\displaystyle \sf{ = \frac{ 2 + 1 }{4} }$

$\displaystyle \sf{ = \frac{3}{4} }$

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