Question

find the value of cos ^2 45°+sin^30°​

Answer 1

ANsWeR :-

$cos {}^{2} 45 \: = \frac{1}{ \sqrt{2} } \\ sin {}^{} 30 \: = \frac{1}{2} \\ \\ \frac{1}{ \sqrt{2} } {}^{2} + \: \frac{1}{2} \\ = \: \frac{1}{2} + \frac{1}{2} \\ = \frac{2}{2 } \\ = \: 1$

Answer 2

Answer:

cos

2

45

o

+sin

2

30

o

=(

2

1

)

2

+(

2

1

)

2

=

2

1

+

4

1

=

4

2+1

=

4

3