Question 93
How many values of $x$, $-19 \lt x \lt 98$, satisfy
$$
\cos^2 x + 2 \sin^2 x = 1?
$$
$$
\cos^2 x + 2 \sin^2 x = 1?
$$
MathNet 1998 — Part 01 Question 93
Math Olympiad Vault · MathNet 1998 — Part 01
Math Olympiad Vault · MathNet 1998 — Part 01