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Write cos 4 theta in terms of cos the...

Write cos ` 4 theta ` in terms of ` cos theta.`

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The correct Answer is:
`8 cos ^(4) theta - 8 cos ^(2) theta +1 `
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ICSE-COMPOUND AND MULTIPLE ANGLES -CHEPTER TEST
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  4. Express cot A in terms of cos 2 A

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  5. Write cos 4 theta in terms of cos theta.

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  11. If sin A = (1)/(sqrt3) and sin B = (1)/(sqrt5) find the value of tan...

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  12. If sin theta = n sin ( theta + 2 alpha ) , show that ( n -1) tan (the...

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