439
4339
2093
4378
Correct answer is D
cosθ = 132+92−1122(13)(9)
= 169+81−2126×9
cosθ = 12926×9
= 4378
Find the variance of the numbers k, k+1, k+2, ...
Solve the inequality: −m2−54≥5m12−76...
If sin θ = xy and 0o < 90o then find 1tanθ...
What number should be subtracted from the sum of 2 16 and 2712 to give&nbs...
Simplify log10 a13 + 14log10 a - 112log10a7...
If A = \(\begin{pmatrix} 2 & 1 \\ 2 & 3 \\ 1 & 2 \end{pmatrix}\...
P={2, 1,3, 9, 1/2}; Q = {1,21/2,3, 7} and R = {5, 4, 21/2}. Find P∪Q∪R ...