Tricky Trig

Geometry Level 1

Find the value of

cos ⁡ 2 4 5 ∘ + sin ⁡ 2 4 5 ∘ . \cos^2 45^{\circ} +\sin^2 45^{\circ}.

0 0 1 2 \frac { 1 }{ 2 } 2 2 \frac { \sqrt { 2 } }{ 2 } 1 1

View wiki
Kritarth Lohomi by kritarth lohomi , 18, India

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Eli Ross Staff
Sep 28, 2015

By the Pythagorean Identities , sin ⁡ 2 ( x ) + cos ⁡ 2 ( x ) = 1 \sin^2(x)+\cos^2(x)=1 for all x . x.

7 Helpful 0 Interesting 1 Brilliant 1 Confused

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...