18. If sec A = root2, find the value of :
3 cos^2A +5 tan^2 A /4 tan^2A - sin^2A
please explain your answer
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Answered by
5
Answer:
Your solution is in the attachment.
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Answered by
7
Answer:
1/4
Step-by-step explanation:
sec A=√2
hyp.=√2
side1=side2=1
sinA=1/√2
A=45°
3cos2A+5/4-sin2A
=3cos90°+5/4-sin90°
=3(0)+5/4-1
=5/4-1
=(5-4)/4=1/4
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