Prove the trigonometric identities
Please prove the following trigonometric identities by using formula and table values
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Prove the trigonometric identities
Please prove the following trigonometric identities by using formula and table values
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Step-by-step explanation:
I will solve 21 problem
sin a + cos a = x --------->1
sin a - cos a = y -------->2
squaring on both sides and add
(sin^2(a)+cos^2(a)+2sinacosa+ sin^2(a)+cos^2(a)-2sinacosa) =x^2+y^2
solving this
1+1=x^2+y^2. (sin^2(a)+cos^2(a)=1)
.: x^2+y^2 = 2