Question

(3 cosec²60° +2 cot 45) x²-(4 tan² 60°) x = 5 cos 90°​

Answer 1

Answer:

x = 0 OR x = 2

Step-by-step explanation:

(3 cosec²60° +2 cot 45) x²-(4 tan² 60°) x = 5 cos 90°​

√    ²   ×

[3(2/√3)² + 2(1)]x² - [4(√3)²]x = 5[0]

[3 × 4/3 + 2]x² - [4×3]x = 0

6x² - 12x = 0

6x(x - 2) = 0

∴ Either 6x = 0 OR (x-2) = 0

∴ Either x = 0 OR x = 2

Answer 2

Answer:

value of cosec60°=2/root3

value of cot45=1

value of tan60=root3

value of cos90=1/root2

so now you can solve it easily