Question

If si theta+ sin² theta=1 show that cos² theta+ cos⁴theta=1

Answer 1

Step-by-step explanation:

SinΦ+sinΦ^2=1

Such that,

SinΦ=1-sin^2

SinΦ=cisΦ^2

Now squaring both side

So that,

1-cosΦ^2=cosΦ^4

CosΦ^4+cosΦ^2=1

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