If tan A + sec A = K, then what is the value of sin A ?
\(\frac{3}{2}\sqrt{41}\)
\(\frac{3}{2}\sqrt{41}\)
\(\frac{2K}{K^2+1}\)
\(\frac{K^2-1}{K^2+1}\)
What is the value of \((a-b)(b+a)(a^2+b^2)(2b^4+2a^4)\) ?
2(a8 - b8)
\(\frac{a^8 - b^8}{2}\)
\(a^8 - b^8\)
\(a^4 - b^4\)
If a + b + c = 0 and a2 + b2 + c2 = 40, then what is the value of 4ab + 4bc + 4ca ?