beweisen cos^2(a)+sin^2(a)=1

Lösung

beweisen

cos^{2} (a) + sin^{2} (a) = 1

Wahr

Schritte zur Lösung

cos^{2} (a) + sin^{2} (a) = 1

Verwende die Pythagoreische Identität:

cos^{2} (x) + sin^{2} (x) = 1

\Rightarrow Wahr

p ro v e csc (x) sin (\frac{π}{2} - x) = cot (x)

p ro v e cos (4 θ) = 2 (cos (2 θ))^{2} - 1

p ro v e tan (2 x) = \frac{2 sin ( x ) cos ( x )}{2 cos ^{2} ( x ) - 1}

p ro v e \frac{1}{csc ^{2} ( x )} + \frac{1}{sec ^{2} ( x )} = 1

p ro v e cot (\frac{5 π}{12}) = 2 - 3