engineering recuitment UPSSSC Assistant Boring Technician 2022 Mock Test Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities
What is the value of \(\frac{\cos^2 20^{\circ}+\cos^2 70^{\circ}}{\sin^2 90^{\circ}}-\tan^2 45^{\circ}\)?
1
-2
2
-1
3
0
4
1