Question

Find the value of: cos2 45° + sin2 30°​

Answer 1

Answer:

3/4 OR 0.75

Step-by-step explanation:

cos 45° = 1/√2

=> cos²45° = (1/√2)² = 1/2

also sin 30° = 1/2

=> sin²30° = (1/2)² = 1/4

so,

cos²45° + sin²30° = 1/2 + 1/4

=  (2+1)/4

= 3/4

= 0.75