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April 23, 2024, 05:19:47 pm

Author Topic: Unit 1 & 2 Specialist Mathematics  (Read 1496 times)  Share 

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kyrie18

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Unit 1 & 2 Specialist Mathematics
« on: March 29, 2017, 12:33:27 pm »
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Can you guys help with the following? Thanks!

a) Show that 1 + cos 2θ = 2 cos2 θ.
b) Show that1 – cos 2θ = 2 sin2 θ.

Prove the following identities.
a) tan A + tan B = sin(A+B)/cos(A)cos(B)
b) cot A + cot B = sin(A+B)/sin(A)sin(B)