Question

cos square 1+cos square 2+cos square3+.................+ cos square 90​

Answer 1

Answer:

44+(1/√2)

hope it helps you

Answer 2

Answer:

Step-by-step explanation:

cos x = sin (90 - x)

⇒cos² x = sin² (90 - x)

⇒cos²x=sin²90- sin²x

⇒sin² x + cos² x = sin²90=1

 

cos² 89 = sin² 1

cos² 88 = sin² 2

........cos² 46 = sin² 44

Total = 44 + cos² 45

        = 44 +  1/√2

HOPE THIS HELPS U

PLS MARK AS BRAINLIEST