Mathematics
Assertion (A): 5 cos 40°.cosec 50° = 5. Reason (R): 5 cos 40°.cosec 50° = 5 cos 40° x cosec (90° - 40°) = 5 cos 40° x 1/cos 40° = 5 1. A is true, R is false. 2. A is false, R is true. 3. Both A and R are true. 4. Both A and R are false.
Related Questions
Assertion (A): If cosec (90° - 3A) = 1; angle A is 30°.
Reason (R):
cosec (90° - 3A) = 1
⇒ 90° - 3A = 90°
⇒ A = 0°- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.
Assertion (A): (2x - 3y, 8) = (2, x + 2y)
⇒ x = 1 and y = -2Reason (R): 2x - 3y = 2 and x + 2y = 8
Solving we get : x = 4 and y = 2- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.
Assertion (A): The slope of line x - y = 8 is - 1.
Reason (R):
x - y = 8
⇒ y = x - 8
∴ Slope = coefficient of x = 1- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.