evaluate sec41 sin49+ cos49 cosec41-2/√3 tan20 tan60 tan70 -3(cos²45-sin²90)
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Step-by-step explanation:
Important formula which is used in the following answer:
sec(90-A)=cosecA
cosec(90-A)=secA
secA.cosA=1
cosecA.sinA=1
tanA.cotA=1
tan60°=✓3
cos45°=1/✓2
sin90°=1
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