SOLUTION: Find the exact value of the expression without a calculator. {{{sin^2(40 degrees) + cos^2(40 degrees)}}}

Algebra ->  Trigonometry-basics -> SOLUTION: Find the exact value of the expression without a calculator. {{{sin^2(40 degrees) + cos^2(40 degrees)}}}      Log On


   

Question 1133725: Find the exact value of the expression without a calculator.
sin%5E2%2840+degrees%29+%2B+cos%5E2%2840+degrees%29
Answer by greenestamps(13200) About Me  (Show Source):
You can put this solution on YOUR website!


sin%28x%29%5E2%2Bcos%28x%29%5E2+=+1 for ANY value of x.

It's the basic trigonometric identity. You will be using it frequently -- learn it!