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3 years ago

12

If sinxcos(pi/7)-sin(pi/7)cosx=-sqrt2/2 then x can equal?

2 answers:

Rom4ik [11]3 years ago

8 0

I'm going for a range of 0 < x <2<span>π

This is R sin (x-a), although R is 1.

a = </span><span>π/7, so

=> sin (x-(</span><span>π/7)) = -1/(sqrt(2))
=> x = 53</span>π/28, 39<span>π/28</span>

Arlecino [84]3 years ago

4 0

Answer:

its's 5pi/4 +pi/7 and 3pi/4+pi/7

Step-by-step explanation:

Just took the quiz on A P E X

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