Solution
Solution
+1
Decimal Notation
Solution steps
Rewrite using trig identities:
Use the Double Angle identity:
Simplify:
Multiply fractions:
Multiply the numbers:
Rewrite using trig identities:
Use the basic trigonometric identity:
Simplify:
Convert element to fraction:
Since the denominators are equal, combine the fractions:
Add similar elements:
Rewrite using trig identities:
Show that:
Use the following product to sum identity:
Show that:
Use the Double Angle identity:
Divide both sides by
Use the following identity:
Divide both sides by
Divide both sides by
Substitute
Show that:
Use the factorization rule:
Refine
Show that:
Use the Double Angle identity:
Divide both sides by
Use the following identity:
Divide both sides by
Divide both sides by
Substitute
Substitute
Refine
Add to both sides
Refine
Take the square root of both sides
cannot be negativecannot be negative
Add the following equations
Refine
Popular Examples
12*sin(51)*2.08-(9.81)/2*2.08^2sin(4*pi/6)(3cos(0.5(21)))/(e^{(-0.1(21)))}3/(tan(22.5))-1/2 sin(180)
Frequently Asked Questions (FAQ)
What is the value of 1-2sin^2((2pi)/5) ?
The value of 1-2sin^2((2pi)/5) is -(sqrt(5)+1)/4