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What is value of sec 16º. Cosec 74º – cot 74º, tan 16°? |
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Answer» sec16.cosec(90-16)-COT(90-16).tan74 =sec16.sec16-tan16.tan16 =sec²16-tan²16 =1 It is POSSIBLE because sec²A-tan²A=1 is TRUE for all VALUES of A which is LESS than 90°. |
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