Question

find the value of sin^2 60 degree -cos^2 70 degree / tan 60 degrees sec 30degree

Answer 1

Answer:

first change cos^2 70degree into sin^2 30degree

and then put values of angles you will be getting answer=1/2.

Answer 2

Answer: 0.3165111

Step-by-step explanation:

$sin^{2} 60^{0} = 3/4 = 0.75\\cos^{2} 70^{0} = 0.11697\\tan60^{0} = \sqrt{3} \\sec30^{0} = 2/\sqrt{3}$

So, $tan60^{0} sec30^{0} = 2$

So, the given expression will be -> $(0.75-0.11697)/2$

Hence, the given expression has value = 0.3165111

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