Q19 of 142 Page 11

Mark the Correct alternative in the following:
The solution of the equation cos² x + sin x + 1 = 0 lies in the interval

1-sin²x+sin x+1=0

sin²x-sin x-2=0

sin x = -1

so, x= 3π/2

and it lies between (5π/4, 7π/4)

Option D

Mark the Correct alternative in the following:

If then general value of θ is

Mark the Correct alternative in the following:

General solution of tan 5x = cot 2x is

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If and 0 < x < 2 π, then the solution are

Mark the Correct alternative in the following:

The number of values of x in the interval [0. 5 π] satisfying the equation 3 sin² x – 7 sin x + 2 = 0 is

Questions · 142

11. Trigonometric Equations

1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 6 6 6 6 6 6 6 6 6 6 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 8 8 9 9 10 10 1 2 3 4 5 6 7 8 9 10 11 12 13 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

Mark the Correct alternative in the following:The solution of the equation cos2 x + sin x + 1 = 0 lies in the interval