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8. Introduction to Trigonometry
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Q7 of 58 Page 8


Prove that:


Consider L.H.S.:

[Using Identity sin 2 θ + cos 2 θ = 1]

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Prove that:
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Prove that: sec 2θ - cot 2(90º - θ ) = cos 2(90º- θ ) + cos 2θ.
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Prove that: cos (81 °+ θ) = sin (9° - θ).
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Prove that: sin θ cos (90°- θ) + cos θ sin (90° - θ) = 1.
Questions · 58
8. Introduction to Trigonometry
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