Find the value 'x', if: - Mathematics

Find the value 'x', if:

बेरीज

In right ΔABC,

sin45° = `"BC"/"AC"`

⇒ `(1)/sqrt(2) = (15)/x`
⇒ x = `15sqrt(2)"cm"`.

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Trigonometric Equation Problem and Solution

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पाठ 27: Trigonometrical Ratios of Standard Angles - Exercise 27.2

पाठ 27 Trigonometrical Ratios of Standard Angles
Exercise 27.2 | Q 9.2

If 4 sin² θ - 1= 0 and angle θ is less than 90°, find the value of θ and hence the value of cos² θ + tan²θ.

If 2 cos 2A = `sqrt3` and A is acute,
find:
(i) A
(ii) sin 3A
(iii) sin² (75° - A) + cos² (45° +A)

If 2 cos (A + B) = 2 sin (A - B) = 1;
find the values of A and B.

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

Solve for x : 2 cos (3x - 15°) = 1

Solve for x : sin² 60° + cos² (3x- 9°) = 1

In the given figure, ∠B = 60°, ∠C = 30°, AB = 8 cm and BC = 24 cm. Find:
a. BE
b. AC

Find the value 'x', if:

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

Evaluate the following: cosec 54° - sec 36°