evaluate 4 cot² 45 - sec² 60 + sin² 60 + cos² 90

Asked by bananti500 | 22nd Jan, 2020, 12:22: AM

Expert Answer:

4 cot² 45 - sec² 60 + sin² 60 + cos² 90
= 4 (1)2 - (2)2 + (√3/2)2 + 0
= 4 - 4 + 3/4
= 3/4

Answered by Sneha shidid | 22nd Jan, 2020, 08:50: AM