Question 641824: How do I solve this??
Find the exact value of the expression.
sin^2 30 degrees + cos^2 60 degrees = Answer by DrBeeee(684) (Show Source):
You can put this solution on YOUR website! sin(x) = cos(90-x), therefore
sin(30) = cos(90-30) = cos(60) = 1/2
Your expression
(1) sin^2(30) + cos^2(60) simplifies to
(2) sin^2(30) + sin^2(30) or
(3) 2*sin^2(30)
Numerically (3) becomes
(4) 2*(1/2)^2 = 1/2
The exact value of (1) is 1/2
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