Q1 of 46 Page 288

Evaluate

C) cosec 31° - sec 59°

By trigonometric identity, we can say

cosec (90° - θ) = sec θ


Replace θ by 59°.


We get


cosec (90° - 59°) = sec 59°


cosec 31° = sec 59°


Now, cosec 31° - sec 59° = sec 59° - sec 59°


cosec 31° - sec 59° = 0


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