मराठी

The value of sec 42° sin 48° + cosec 35° cos 55° is ______. - Mathematics

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प्रश्न

The value of sec 42° sin 48° + cosec 35° cos 55° is ______.

पर्याय

  • 3

  • 0

  • 1

  • 2

MCQ
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उत्तर

The value of sec 42° sin 48° + cosec 35° cos 55° is 2.

Explanation:

sin 48° = cos 42° and cos 55° = sin 35°.

So, sec 42° · sin 48°

= `1/(cos 42^circ) · cos 42^circ` 

= 1

And cosec 35° · cos 55° 

= `1/(sin 35^circ) · sin 35°` 

= 1

Sum = 1 + 1

= 2

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पाठ 18: Trigonometric Ratios of Some Standard Angles and Complementary Angles - Exercise 18D [पृष्ठ ३८१]

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नूतन Mathematics [English] Class 9 ICSE
पाठ 18 Trigonometric Ratios of Some Standard Angles and Complementary Angles
Exercise 18D | Q 10. | पृष्ठ ३८१
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