10) Verify the following identities: a) $cos 2 ? = \frac{1 ? t a n ^{2} ?}{1 + t a n ^{2} ?}$ b) $(cos x ? sin x)^{2} = 1 ? sin 2 x$ 11) Find the value of each of the following: a) $sin \frac{?}{2}$ , where $cos ? = ? \frac{1}{3}$ and $?$ is in quadrant III. b) $cos 1 5^{?}$ using the half-angle formula

Question

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10) Verify the following identities: a)

cos 2 ? = \frac{1 ? t a n ^{2} ?}{1 + t a n ^{2} ?}

b)

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

11) Find the value of each of the following: a)

sin \frac{?}{2}

, where

cos ? = ? \frac{1}{3}

and

?

is in quadrant III. b)

cos 1 5^{?}

using the half-angle formula

Accepted Answer

Expert Answer to -      10) Verify the following identities: a) cos2=1+tan21tan2 b) (cosxsinx)2=1sin2

Answer

Solution for -      10) Verify the following identities: a) cos2=1+tan21tan2 b) (cosxsinx)2=1sin2

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This an additional answer to -      10) Verify the following identities: a) cos2=1+tan21tan2 b) (cosxsinx)2=1sin2

(Solved): 10) Verify the following identities: a) cos2=1+tan21tan2 b) (cosxsinx)2=1sin2 ...