मराठी

Solve for x : 2 cos (3x − 15°) = 1

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प्रश्न

Solve for x : 2 cos (3x − 15°) = 1

बेरीज
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उत्तर

2 cos(3x –15°) = 1

cos (3x – 15°) = `(1)/(2)`

cos (3x – 15°) = cos 60°

3x – 15° = 60°

3x = 75°

x = 25°

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Trigonometric Equation Problem and Solution
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पाठ 21: Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals] - TEST YOURSELF [पृष्ठ ३३५]

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सेलिना Concise Mathematics [English] Class 9 ICSE
पाठ 21 Trigonometrical Ratios [Sine, Consine, Tangent of an Angle and their Reciprocals]
TEST YOURSELF | Q 7. (v) | पृष्ठ ३३५
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