Arturo O. answered • 08/21/16

Experienced Physics Teacher for Physics Tutoring

^{2}x = (1/2)[1 + cos(2x)]

^{2}(95) = (1/2)[1 + cos(2*95)] = (1/2)(1 - 0.98480775) = 0.007596125

Will R.

asked • 08/21/16I was assigned a math packet for an engineering class and I'm supposed to show work on all problems. Is there any handwritten way to solve this?

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Arturo O. answered • 08/21/16

Experienced Physics Teacher for Physics Tutoring

Another way is to use the trigonometric identity

cos^{2}x = (1/2)[1 + cos(2x)]

cos^{2}(95) = (1/2)[1 + cos(2*95)] = (1/2)(1 - 0.98480775) = 0.007596125

Mark M. answered • 08/21/16

Mathematics Teacher - NCLB Highly Qualified

cos^{2} 95 = (1 + cos 190) / 2

cos^{2} 95 ≈ (1 + (-0.9848) / 2

cos^{2 }95 ≈ 0.01519 / 2

cos^{2} 95 ≈ 0.007596

Kenneth S. answered • 08/21/16

I unveil the mysteries and secrets of trigonometry & you'll love it.

Engineering! First, find cos (95^{o}) = -0.0871557, to 7 DP

Second, square that number. Answer:0. 007596

Chunli M. answered • 08/21/16

Highly experienced tutor with PhD degree

cos^{2}(95) = cos(95) * cos(95) = (-0.08716) * (-0.08716) = 0.007596

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