3cos²45+5sin²45+2tan²45
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4
Step-by-step explanation:
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Answer: 6
Step-by-step explanation:
cos45=1/√2
sin45=1/√2
tan45=1
3cos^2(45)+5sin^2(45)+2tan^2(45) = 3*(1/√2)^2+5*(1/√2)^2+2*(1)^2
= 3*1/2+5*1/2+2*1
= 3/2+5/2+2
= (3+5+4)/2
= 12/2
= 6
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