Trig question?

I need to use an identity to find the value of this expression..

sin^2 π over 10 + cos^2 π over 10

ty for your help =)

Top 2 Answers

A few days ago

Aquaboy

Favorite Answer

In other words, sin^2(π/10) + cos^2(π/10) = ?

(Was this your question?)

Recall the following trigonometric identity:

sin^2(x) + cos^2(x) = 1

(Regardless of the ‘x’ value)

Therefore,

sin^2(π/10) + cos^2(π/10) = 1

A few days ago

3.14159

Yep it’s 1. It could be Sin^2(apple)+Cos^s(apple) and it would still equal 1.

Sin^2+Cos^2=1

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