Question

cos x= -1/√2
find principal solution ​

Answer 1

Answer:

x =120

Step-by-step explanation:

cosx=—1/2

or,cosx=—(cos180-60)

or,x =120⁰

Answer 2

Answer:

iska answer

$1 \sqrt{2}$

Step-by-step explanation:

Kyu ki jiska aage

$\sqrt{?}$

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