Question

8) What is the value of Cosec² 30 + Sin² 45+ Cos² 60 ? a)49/32 b)32/81 c)19/4 d)None of these​

Answer 1

Answer:

c) 19/4

Step-by-step explanation:

Value of Cosec 30 = 2

Value of Sin 45 = 1/✓2

Value of Cos 60 = 1/2

So putting these value in the equation

(2)^2 + (1/✓2)^2 + (1/2)^2

= 4 + 1/2 + 1/4

= 19/4