1.

What is value of sec 16º. Cosec 74º – cot 74º, tan 16°?​

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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