This is actually a lot easier than it seems :-)! There is a formula in trig called the Pythagorean Theorem. This is cos^2 x + sin^2 x = 1. This means that cos^2 x means the exact same thing as 1-sin^2 x. If we plug this in, we get 1-2sin^2 pi/9. Another helpful trigonometric equation is the double angle identity. This is cos(2x)=1-2sin^2 (x). Plugging our equation from earlier in, we get cos 2pi/9.
Answer:
D) is the answer
Step-by-step explanation:
It is taught in 5th class in India
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Because I am Indian and solving your question from India.
Answer:
2220
Step-by-step explanation:
First you have to multiply the 37*2 , and you would get 74, next you would have to multiple 74*30 getting you the final answer of 2220
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Step-by-step explanatsdfghjhgfghjk
