SOLUTION: 2 math questions? 1.) Solve: sin20 + root2/2 = 0 if degrees is less than or equal to thada which is less than 360 2.) Evaluate: tan^2(315)

SOLUTION: 2 math questions? 1.) Solve: sin20 + root2/2 = 0 if degrees is less than or equal to thada which is less than 360 2.) Evaluate: tan^2(315) - sec^2(225) +cot^2(120)

Question 753128: 2 math questions?
1.) Solve: sin20 + root2/2 = 0 if degrees is less than or equal to thada which is less than 360
2.) Evaluate: tan^2(315) - sec^2(225) +cot^2(120)
Answer by lwsshak3(11628) (Show Source): You can put this solution on YOUR website!
1.) Solve: sin20 + root2/2 = 0, if 0 degrees is less than or equal to thada which is less than 360
sin20+√2/2=0
sin20=-√2/2
..
2.) Evaluate: tan^2(315) - sec^2(225) +cot^2(120)
tan^2(315)=(-1)^2=1
- sec^2(225)=-1/cos^2(225)=-1/(-√2/2)^2=-1/(1/2)=-2
cot^2(120)=1/tan^2(120)=1/(-√3)^2=1/3
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