If sinx=2cosx then, what is the value of sin2x?

Sin2x = 0.801

Step-by-step explanation:

Given  :  sinx = 2cosx .

To find : what is the value of sin2x.

Solution : We have given

sinx = 2cosx .

On dividing both sides by cos x

=  2 .

tan x = 2

Taking inverse of tanx .

x = .

x = 63.43

We need to find Sin2x .

Sin2x = Sin2(63.43)

Sin2x = Sin ( 126.86).

Sin2x = 0.801

Therefore, Sin2x = 0.801

7. d. 64

8. i. 32

9. c. 125

10. j. none of the above

11. d. 81

12. i. 216

13. e. none of the above

14. g. 240

15. e. none of the above

16. g. 32

17.   e. none of the above

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.