cos^2 20°+cos^2 70°÷sin^2 59°+sin^2 31°
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Sin theta sin 90 - theta minus cos theta cos 90 - theta is equal to zero prove
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Solve without using trigonometric tables
(tan 20 / cot 70)+(cot 50 / tan 40 ) +((sin2 20 + sin2 70 )/ sin theta cos (90 - theta ) +cos theta sin (90 - theta)
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Cos(90-theta)sec(90-theta)tan(theta)upon cosec(90-theta)sin(90-theta)cot(90-theta)+tan(90-theta)upon cot(theta) =2
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we know that Sin^2 A + Cos^2 A = 1
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