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find the value of : tan 45 ° cos e c 30 ° + sec 60 ° c o 45 ° – 5 sin 90 ° 2 cos 0 ° - Mathematics

Sum

find the value of :

`( tan 45°)/ (cos ec30°) +( sec60°)/(co 45°) – (5 sin 90°)/ (2 cos 0°)`

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Solution

`( tan 45°)/ (cos ec30°) +( sec60°)/(co 45°) – (5 sin 90°)/ (2 cos 0°) = (1)/(2) + (2)/(1)+(5)/(2)`

`= ( 1 + 4 – 5)/(2) = 0`

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APPEARS IN

Selina Concise Mathematics Class 9 ICSE
Chapter 23 Trigonometrical Ratios of Standard Angles [Including Evaluation of an Expression Involving Trigonometric Ratios]
Exercise 23 (A) | Q 2.2 | Page 291
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