Question

root3 tanA=1, then (sinA+cosA)(sinA-cosA)=

Answer 1

Answer:

-1/2

Step-by-step explanation:

tanA=1/root

therefore angle A=30

(sinA+cosA)(sinA-cosA)

(1/2+root2/2)(1/2-root3/2)

(1/2)^2-(root3/2)^2

1/4-3/4

-2/4

-1/2

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