Mathematics
Assertion (A): The value of sin2 30° - 2 cos3 60° + 2 tan4 45° is 2. Reason (R): sin 30° = , cos 60° = , and tan 45° = 1 1. A is true, but R is false. 2. A is false, but R is true. 3. Both A and R are true, and R is the correct reason for A. 4. Both A and R are true, and R is the incorrect reason for A.
Related Questions
Statement 1: The angle C of a right angled triangle is 90°, then tan A = cot B.
Statement 2: Since, angle C of triangle ABC = 90°.
∴ ∠A + ∠B = 90° ⇒ ∠A = 90° - ∠B
Both the statements are true.
Both the statements are false.
Statement 1 is true, and statement 2 is false.
Statement 1 is false, and statement 2 is true.
Assertion (A): If A = 30°, the value of 4 sin A sin (60° - A) sin (60° + A) = 1.
Reason (R): 60° - A = 30° and 60° + A = 90°.
A is true, but R is false.
A is false, but R is true.
Both A and R are true, and R is the correct reason for A.
Both A and R are true, and R is the incorrect reason for A.