Express each of the following in terms of trigonometric ratios of angles between 0° and 45°: cosec64° + sec70°

Sum

cosec64° + sec70°
= cosec(90° - 26°) + sec(90° - 20°)
= sec26° + cosec20°)

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Trigonometric Equation Problem and Solution

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Chapter 22: Trigonometrical Ratios of Standard Angles - Exercise 27.3

Chapter 22 Trigonometrical Ratios of Standard Angles
Exercise 27.3 | Q 4.3

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

Find the value of 'A', if 2 sin 2A = 1

Find the value of 'A', if cosec 3A = `(2)/sqrt(3)`

If θ = 15°, find the value of: cos3θ - sin6θ + 3sin(5θ + 15°) - 2 tan²3θ

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

Evaluate the following: cosec 54° - sec 36°

Express each of the following in terms of trigonometric ratios of angles between 0° and 45°: cos72° - cos88°

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If sin(θ - 15°) = cos(θ - 25°), find the value of θ if (θ-15°) and (θ - 25°) are acute angles.

If P, Q and R are the interior angles of ΔPQR, prove that `cot(("Q" + "R")/2) = tan "P"/(2)`