if **cos** theta + **cos ^{2} ** theta =

**1**

**than prove thhat**

**sin ^{2} ** theta +

**sin**theta=

^{4}**1**

Here is the link for the answer to your query:

https://www.meritnation.com/ask-answer/question/if-cos-a-cos2-a-1-then-sin2-a-sin4-a-is/math/2896031

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