Find the value of 'A', if 2cos 3A = 1 - Mathematics

Find the value of 'A', if 2cos 3A = 1

योग

2cos 3A = 1
⇒ cos 3A = `(1)/(2)`
⇒ cos 3A = cos60°
⇒ 3A = 60°
⇒ A = 20°.

shaalaa.com

Trigonometric Equation Problem and Solution

क्या इस प्रश्न या उत्तर में कोई त्रुटि है?

अध्याय 27: Trigonometrical Ratios of Standard Angles - Exercise 27.1

अध्याय 27 Trigonometrical Ratios of Standard Angles
Exercise 27.1 | Q 4.4

State for any acute angle θ whether sin θ increases or decreases as θ increases

State for any acute angle θ whether tan θ increases or decreases as θ decreases.

Solve the following equations for A, if `sqrt3` tan A = 1

Solve the following equation for A, if 2 sin A = 1

Find the magnitude of angle A, if 2 tan 3A cos 3A - tan 3A + 1 = 2 cos 3A

Find the value of 'A', if (2 - cosec 2A) cos 3A = 0

In a rectangle ABCD, AB = 20cm, ∠BAC = 60°, calculate side BC and diagonals AC and BD.

Find the value 'x', if:

Evaluate the following: `(sin62°)/(cos28°)`

Prove the following: tanθ tan(90° - θ) = cotθ cot(90° - θ)