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Post under tag trigonometry
Recent puzzles under tag trigonometry
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If sin x + sin y + sin z = 0 and cos x + cos y + cos z = 0 then what is the value of cos (x - y) = ?
posted
May 18
by
Rahul Vaidya
mathematical
trigonometry
+2
votes
Trigonometry: tanA+secA=x than prove that sinA=x²-1/x²+1
posted
Dec 10, 2017
by
Rohit Kumar
trigonometry
mathematical
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