Question

Cos^2 35°+sin^2 55°? помогите ​

Answer 1

$cos^2 35^o+sin^2 55^o=cos^2 (90^o-55^o)+sin^2 55^o=\\sin^255^o+sin^255^o=2sin^255^o$

Answer 2

Sure, I'd be happy to help!

In trigonometry, one of the most famous trigonometric identities is the Pythagorean identity, which states:

sin^2θ + cos^2θ = 1

Where θ is any angle in degrees or radians. Using this identity, we can find the value of cos^2 35° + sin^2 55°:

cos^2 35° + sin^2 55° = 1

So, the answer is 1.