Asked by Jennifer
Evalute the expressions:
1). sin(π/3)+cos(π/3)
2). (cos 45°)^2-(sin 45°)^2
1). sin(π/3)+cos(π/3)
2). (cos 45°)^2-(sin 45°)^2
Answers
Answered by
bobpursley
draw a 30-60-90 triangle
cos60=1/2 sin60=1/2 *sqrt3
draw a 45-45-90 triangle
cos45=1/sqrt2
sin45=1/sqrt2
I hope that helps
cos60=1/2 sin60=1/2 *sqrt3
draw a 45-45-90 triangle
cos45=1/sqrt2
sin45=1/sqrt2
I hope that helps
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