How do you evaluate cos(135)?
1 Answer
Jul 1, 2018
Explanation:
cos135^@=-cos(180-135)^@=-cos45^@
-cos45^@=-1/sqrt2xxsqrt2/sqrt2=-sqrt2/2
cos135^@=-cos(180-135)^@=-cos45^@
-cos45^@=-1/sqrt2xxsqrt2/sqrt2=-sqrt2/2